NCERT Solutions for Exercise 6.3 Class 11 Maths Chapter 6 - Linear Inequalities

NCERT Solutions for Exercise 6.3 Class 11 Maths Chapter 6 - Linear Inequalities

Edited By Vishal kumar | Updated on Nov 07, 2023 06:48 AM IST

NCERT Solutions for Class 11 Maths Chapter 6: Linear Inequalities Exercise 6.3- Download Free PDF

NCERT Solutions for Class 11 Maths Chapter 6: Linear Inequalities Exercise 6.3- In the section before exercise 6.3 Class 11 Maths, the NCERT presented the topics of linear inequalities in one and two variables and their graphical solutions. In NCERT solutions for exercise 6.3 Class 11 Maths chapter 6 the questions related to the system of two-variable linear inequalities is discussed. Solving the Class 11 Maths chapter 6 exercise 6.3 will give a good idea of the concepts discussed before Class 11th Maths chapter 6 exercise 6.3. Before practising the NCERT solutions for Class 11 Maths Chapter 6 Exercise 6.3 it's better to go through the solved examples given in the NCERT book prior to Class 11 Maths chapter 6 exercise 6.3.

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  1. NCERT Solutions for Class 11 Maths Chapter 6: Linear Inequalities Exercise 6.3- Download Free PDF
  2. Access Linear Inequalities Class 11 Chapter 6-Exercise: 6.3
  3. Question:1 Solve the following system of inequalities graphically:
  4. More About NCERT Solutions for Class 11 Maths Chapter 6 Exercise 6.3
  5. Benefits of NCERT Solutions for Class 11 Maths Chapter 6 Exercise 6.3
  6. Key Features of NCERT 11th Class Maths Exercise 6.3 Answers
  7. NCERT Solutions of Class 11 Subject Wise
  8. Subject Wise NCERT Exampler Solutions
NCERT Solutions for Exercise 6.3 Class 11 Maths Chapter 6 - Linear Inequalities
NCERT Solutions for Exercise 6.3 Class 11 Maths Chapter 6 - Linear Inequalities

11th class maths exercise 6.3 answers are written by subject experts at Careers360 in great detail and step-by-step, ensuring that students can easily understand them. In addition to the text solutions of ex 6.3 class 11, PDF versions of the solutions are also available for students, and they are provided free of charge. This allows students to access and use them anytime and anywhere. The following exercises are also listed in the NCERT syllabus for Class 11 Mathematics.

**As per the new CBSE Syllabus for 2023-24, this chapter has been assigned a different number, and it is now referred to as Chapter 5.

Download the PDF of NCERT Solutions for Class 11 Maths Chapter 6 – Linear Inequalities Exercise 6.3

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Access Linear Inequalities Class 11 Chapter 6-Exercise: 6.3

Question:1 Solve the following system of inequalities graphically:

x \geq 3,\ y\geq 2

Answer:

x \geq 3,\ y\geq 2

Graphical representation of x=3 and y=2 is given in the graph below.

The line x=3 and y=2 divides plot in four regions i.e.I,II,III,IV.

For x \geq 3 ,

The solution to this inequality is region II and III including points on this line because points on the line also satisfy the inequality.

For y \geq 2 ,

The solution to this inequality is region IV and III including points on this line because points on the line also satisfy the inequality.

Hence, solution to x \geq 3,\ y\geq 2 is common region of graph i.e. region III.

Thus, solution of x \geq 3,\ y\geq 2 is region III.

This can be represented as follows:

j

The below green colour represents the solution

1

Question:2 Solve the following system of inequalities graphically: 3x +2y \leq 12,\ x \geq 1, \ y\geq 2

Answer:

3x +2y \leq 12,\ x \geq 1, \ y\geq 2

Graphical representation of x=1 \, \, ,3x+2y=12 and y=2 is given in graph below.

For x \geq 1 ,

The solution to this inequality is region on right hand side of line (x=1) including points on this line because points on the line also satisfy the inequality.

For y \geq 2 ,

The solution to this inequality is region above the line (y=2) including points on this line because points on the line also satisfy the inequality.

For 3x+2y\leq 12

The solution to this inequality is region below the line (3x+2y= 12) including points on this line because points on the line also satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure including points on the respective lines.

This can be represented as follows:

1635762856044

Question:3 Solve the following system of inequalities graphically: 2x +y \geq 6, 3x +4y\leq 12

Answer:

2x +y \geq 6, 3x +4y\leq 12

Graphical representation of 2x +y =6\, \, and\, \, 3x +4y=12 is given in the graph below.

For 2x +y \geq 6 ,

The solution to this inequality is region above line (2x +y =6) including points on this line because points on the line also satisfy the inequality.

For 3x +4y\leq 12 ,

The solution to this inequality is region below the line ( 3x +4y= 12) including points on this line because points on the line also satisfy the inequality.

Hence, the solution to these linear inequalities is the shaded region(ABC) as shown in figure including points on the respective lines.

This can be represented as follows:

1635762935162

Question:4 Solve the following system of inequalities graphically: x + y \geq 4, 2x - y <0

Answer:

x + y \geq 4, 2x - y <0

Graphical representation of x +y =4\, \, and\, \, 2x -y=0 is given in the graph below.

For x + y \geq 4, ,

The solution to this inequality is region above line (x +y =4) including points on this line because points on the line also satisfy the inequality.

For 2x - y <0 ,

The solution to this inequality is half plane corresponding to the line ( 2x -y=0) containing point (1,0) excluding points on this line because points on the line does not satisfy the inequality.

Hence, the solution to these linear inequalities is the shaded region as shown in figure including points on line (x +y =4) and excluding points on the line ( 2x -y=0) .

This can be represented as follows:

1635763100696

Question:5 Solve the following system of inequalities graphically: 2x - y > 1, \ x -2y < -1

Answer:

2x - y > 1, \ x -2y < -1

Graphical representation of x -2y =-1\, \, and\, \, 2x -y=1 is given in graph below.

For 2x - y > 1,

The solution to this inequality is region below line ( 2x -y=1) excluding points on this line because points on line does not satisfy the inequality.

For \ x -2y < -1 ,

The solution to this inequality is region above the line (x -2y =-1) excluding points on this line because points on line does not satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure excluding points on the lines.

This can be represented as follows:

1635763130508

Question:6 Solve the following system of inequalities graphically: x + y \leq 6, x + y \geq 4

Answer:

x + y \leq 6, x + y \geq 4

Graphical representation of x + y = 6,\, \, and\, \, \, x + y = 4 is given in the graph below.

For x + y \leq 6,

The solution to this inequality is region below line ( x+y=6) in cluding points on this line because points on the line also satisfy the inequality.

For x + y \geq 4 ,

The solution to this inequality is region above the line ( x+y=4) including points on this line because points on the line also satisfy the inequality.

Hence, the solution to these linear inequalities is shaded region as shown in figure including points on the lines.

This can be represented as follows:

1635763165801

Question:7 Solve the following system of inequalities graphically: 2x + y \geq 8 , x + 2y \geq 10

Answer:

2x + y \geq 8 , x + 2y \geq 10

Graphical representation of 2x + y = 8\, \, and\, \, x + 2y =10 is given in graph below.

For 2x + y \geq 8 ,

The solution to this inequality is region above line (2x + y = 8) including points on this line because points on line also satisfy the inequality.

For x + 2y \geq 10 ,

The solution to this inequality is region above the line ( x + 2y =10) including points on this line because points on line also satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure including points on the lines.

This can be represented as follows:

1635763179656

Question:8 Solve the following system of inequalities graphically: x + y \leq 9, y > x, x\geq 0

Answer:

x + y \leq 9, y > x, x\geq 0

Graphical representation of x+y=9,x=y and x=0 is given in graph below.

For x + y \leq 9 ,

The solution to this inequality is region below line (x+y=9) including points on this line because points on line also satisfy the inequality.

For y > x ,

The solution to this inequality represents half plane corresponding to the line (x=y) containing point (0,1) excluding points on this line because points on line does not satisfy the inequality.

For x\geq 0 ,

The solution to this inequality is region on right hand side of the line (x=0) including points on this line because points on line also satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure.

This can be represented as follows:

1635763196635

Question:9 Solve the following system of inequalities graphically: 5x+4y\leq20, \ x\geq 1, \ y\geq 2

Answer:

5x+4y\leq20, \ x\geq 1, \ y\geq 2

Graphical representation of \, ,5x+4y=20,\, \, \, x=1\, \, and \, \, y=2 is given in graph below.

For 5x+4y\leq20, ,

The solution to this inequality is region below the line (5x+4y=20) including points on this line because points on line also satisfy the inequality.

For \ x\geq 1, ,

The solution to this inequality is region right hand side of the line (x=1) including points on this line because points on line also satisfy the inequality.

For \ y\geq 2,

The solution to this inequality is region above the line (y=2) including points on this line because points on line also satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure including points on the respective lines.

This can be represented as follows:

1635763228699

Question:10 Solve the following system of inequalities graphically: 3x + 4y \leq 60,\ x + 3y \leq 30, \ x \geq 0, \ y\geq 0

Answer:

3x + 4y \leq 60,\ x + 3y \leq 30, \ x \geq 0, \ y\geq 0

Graphical representation of 3x+4y=60 \, \, ,x+3y=30\, \, \, ,x=0\, \, and\, \, y=0 is given in graph below.

For 3x + 4y \leq 60 ,

The solution to this inequality is region below the line (3x+4y=60) including points on this line because points on line also satisfy the inequality.

For \ x + 3y \leq 30 ,

The solution to this inequality is region below the line (x+3y=30) including points on this line because points on line also satisfy the inequality.

For \ x \geq 0,

The solution to this inequality is region right hand side of the line (x=0) including points on this line because points on line also satisfy the inequality.

For \ y \geq 0,

The solution to this inequality is region above the line (y=0) including points on this line because points on line also satisfy the inequality.

Hence, the solution to these linear inequalities is shaded region as shown in figure including points on the respective lines.

This can be represented as follows:

1635763315671

Question:11 Solve the following system of inequalities graphically: 2x +y \geq 4, \ x + y \leq 3, \ 2x - 3y \leq 6

Answer:

2x +y \geq 4, \ x + y \leq 3, \ 2x - 3y \leq 6

Graphical representation of 2x+y=4 \, \, ,x+y=3 and 2x-3y=6 is given in graph below.

For 2x +y \geq 4, ,

The solution to this inequality is region above the line (2x+y=4) including points on this line because points on line also satisfy the inequality.

For \ x + y \leq 3, ,

The solution to this inequality is region below the line (x+y=3) including points on this line because points on line also satisfy the inequality.

For \ 2x - 3y \leq 6,

The solution to this inequality is region above the line (2x-3y= 6) including points on this line because points on line also satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure including points on the respective lines.

This can be represented as follows:

1655375979301

Question:12 Solve the following system of inequalities graphically: x -2y \leq 3, 3x + 4y \geq 12, x \geq 0, y\geq 1

Answer:

x -2y \leq 3, 3x + 4y \geq 12, x \geq 0, y\geq 1

Graphical representation of x-2y=3 \, \, ,3x+4y=12\, \, \, ,x=0\, \, and\, \, y=1 is given in graph below.

For x -2y \leq 3 ,

The solution to this inequality is region above the line (x-2y=3) including points on this line because points on line also satisfy the inequality.

For 3x + 4y \geq 12 ,

The solution to this inequality is region above the line (3x+4y=12) including points on this line because points on line also satisfy the inequality.

For \ x \geq 0,

The solution to this inequality is region right hand side of the line (x=0) including points on this line because points on line also satisfy the inequality.

For \ y \geq 1,

The solution to this inequality is region above the line (y=1) including points on this line because points on line also satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure including points on the respective lines.

This can be represented as follows:

1635763420814

Question:13 Solve the following system of inequalities graphically: 4x + 3y \leq 60,\ y\geq 2x,\ x\geq 3,\ x,y\geq 0

Answer:

4x + 3y \leq 60,\ y\geq 2x,\ x\geq 3,\ x,y\geq 0

Graphical representation of 4x+3y=60 \, \, ,y=2x\, \, \,,x=3\, \, ,x=0\, \, and\, \, y=0 is given in graph below.

For 4x + 3y \leq 60,

The solution to this inequality is region below the line (4x+3y=60) including points on this line because points on the line also satisfy the inequality.

For y\geq 2x ,

The solution to this inequality is region above the line (y=2x) including points on this line because points on the line also satisfy the inequality.

For x\geq 3 ,

The solution to this inequality is region right hand side of the line (x=3) including points on this line because points on the line also satisfy the inequality.

For \ x \geq 0,

The solution to this inequality is region right hand side of the line (x=0) including points on this line because points on the line also satisfy the inequality.

For \ y \geq 0,

The solution to this inequality is region above the line (y=0) including points on this line because points on line also satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure including points on the respective lines.

This can be represented as follows:

1635763491115

Question:14 Solve the following system of inequality graphically: 3x + 2y \leq 150, \ x +4y \leq 80,\ x\leq 15 \ y\geq 0, \ x\geq 0

Answer:

3x + 2y \leq 150, \ x +4y \leq 80,\ x\leq 15 \ y\geq 0, \ x\geq 0

Graphical representation of 3x+2y=150 \, \, ,x+4y=80\, \, \,,x=15\, \, ,x=0\, \, and\, \, y=0 is given in graph below.

For 3x + 2y \leq 150,

The solution to this inequality is region below the line (3x+2y=150) including points on this line because points on the line also satisfy the inequality.

For x+4y\leq 80 ,

The solution to this inequality is region below the line (x+4y=80) including points on this line because points on the line also satisfy the inequality.

For x\leq 15 ,

The solution to this inequality is region left hand side of the line (x=15) including points on this line because points on the line also satisfy the inequality.

For \ x \geq 0,

The solution to this inequality is region right hand side of the line (x=0) including points on this line because points on the line also satisfy the inequality.

For \ y \geq 0,

The solution to this inequality is region above the line (y=0) including points on this line because points on line also satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure including points on the respective lines.

This can be represented as follows:

1635763512601

Question:15 Solve the following system of inequality graphically: x+2y \leq 10, \ x +y \geq 1, \ x-y\leq 0, x\geq 0, \ y\geq 0

Answer:

x+2y \leq 10, \ x +y \geq 1, \ x-y\leq 0, x\geq 0, \ y\geq 0

Graphical representation of x+2y=10 \, \, ,x+y=1\, \, \,,x-y=0\, \, ,x=0\, \, and\, \, y=0 is given in graph below.

For x+2y \leq 10,

The solution to this inequality is region below the line (x+2y=10) including points on this line because points on line also satisfy the inequality.

For \ x +y \geq 1, ,

The solution to this inequality is region above the line (x+y=1) including points on this line because points on line also satisfy the inequality.

For \ x-y\leq 0, ,

The solution to this inequality is region above the line (x-y=0) including points on this line because points on line also satisfy the inequality.

For \ x \geq 0,

The solution to this inequality is region right hand side of the line (x=0) including points on this line because points on line also satisfy the inequality.

For \ y \geq 0,

The solution to this inequality is region above the line (y=0) including points on this line because points on line also satisfy the inequality.

Hence, solution to these linear inequalities is shaded region as shown in figure including points on the respective lines.

This can be represented as follows:

1635763543684

More About NCERT Solutions for Class 11 Maths Chapter 6 Exercise 6.3

There are a total of fifteen questions in exercise 6.3 Class 11 Maths. Solving all these questions will improve the problem-solving skills of the concept solutions of linear inequalities in two variables graphically. Solved examples are given prior to the Class 11th Maths chapter 6 exercise 6.3 to understand the steps involved in solving the questions of the type discussed in Class 11 Maths chapter 6 exercise 6.3.

Also Read| Linear Inequalities Class 11th Notes

Benefits of NCERT Solutions for Class 11 Maths Chapter 6 Exercise 6.3

  • The content covered in exercise 6.3 Class 11 Maths is helpful in revising the concepts discussed in the chapter.

  • Practising problems is important for maths subjects. And the Class 11 Maths chapter 6 exercise 6.3 helps for the same.

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Key Features of NCERT 11th Class Maths Exercise 6.3 Answers

  1. Comprehensive Coverage: The class 11 maths ex 6.3 answers provided cover all the exercises and problems in Chapter 6, Exercise 6.3 of the NCERT 11th Class Mathematics textbook.

  2. Step-by-Step Solutions: The class 11 ex 6.3 answers are presented in a step-by-step format, making it easier for students to follow and understand the solution process.

  3. Clarity and Accuracy: The class 11 maths chapter 6 exercise 6.3 solutions are written with clarity and accuracy, ensuring that students can grasp the concepts and methods required to solve mathematical problems.

  4. Use of Proper Notation: The 11th class maths exercise 6.3 answers use appropriate mathematical notations and terminology, helping students become familiar with the language of mathematics.

  5. Free Access: The ex 6.3 class 11 answers are typically made available for free, allowing students to access them without any cost, making it a valuable resource for self-study.

  6. Supplementary Learning: These class 11 maths ex 6.3 answers can be used as a supplementary learning resource to reinforce classroom learning and aid in exam preparation.

  7. Homework and Practice: Students can use these answers to check their work, practice problem-solving, and improve their overall performance in mathematics.

Also see-

NCERT Solutions of Class 11 Subject Wise

Subject Wise NCERT Exampler Solutions

Frequently Asked Questions (FAQs)

1. Give examples of linear inequalities?

2x>5

2x+3y>5

2. Give examples for a system of linear inequalities

X>0,y>2

2x+y.6, 3x+y<12

3. The quadrant that represents both x and y coordinate greater than or equal to zero is………?

The first quadrant

4. Give an application of linear inequalities?

In solving linear programming problems, linear inequalities are used.

5. How many questions are solved in the exercise 6.3 Class 11 Maths?

15 questions are solved in the NCERT solutions for Class 11 Maths chapter 6 exercise 6.3

6. What method is used to solve the linear inequalities given in the Class 11 Maths chapter 6 exercise 6.3?

Graphical method

7. Why do we solve Class 11 Maths chapter 6 exercise 6.3?

To get an exposure to the concepts of solving a system of linear inequalities in two variables using the graphical method

8. What is the importance of NCERT Class 11 Maths exercises?

As far as mathematics is concerned it is a subject that requires a good amount of practice. And the NCERT exercise helps for the same. 

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A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

Option 2)

200 \, \, J - 500 \, \, J

Option 3)

2\times 10^{5}J-3\times 10^{5}J

Option 4)

20,000 \, \, J - 50,000 \, \, J

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced

Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

Option 2)

increase two fold

Option 3)

remain unchanged

Option 4)

be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

Option 4)

558.5 × 6.023 × 1023

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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