NCERT Solutions for Miscellaneous Exercise Chapter 6 Class 11 - Linear Inequalities

NCERT Solutions for Miscellaneous Exercise Chapter 6 Class 11 - Linear Inequalities

Edited By Vishal kumar | Updated on Nov 16, 2023 12:38 PM IST

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

NCERT solutions for Class 11 Maths Chapter 6 miscellaneous exercises are the solutions to the practice questions given at the end of the chapter. The Class 11 Maths Chapter 6 miscellaneous exercise solutions cover all the topics of the chapter linear inequalities. The questions based on all other three exercises of the chapter are discussed in the Class 11 Maths chapter 6 miscellaneous solutions. Miscellaneous exercise Chapter 6 Class 11 gives more practice questions of the concepts discussed in the chapter linear inequalities.

The class 11 chapter 6 maths miscellaneous solutions provided by subject experts at Careers360 are presented in a clear and easily understandable language. They are crafted in a step-by-step format, ensuring simplicity and clarity for students. Additionally, PDF versions of the class 11 maths ch 6 miscellaneous exercise solutions are available, allowing students to choose the format that suits their preferences and comfort. The other exercises discussed in the NCERT book chapter linear inequalities are discussed below.

**In the CBSE Syllabus for 2023-24, miscellaneous exercise class 11 chapter 6 has been renumbered as Chapter 5.

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

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Access Linear Inequalities Class 11 NCERT Maths- Miscellaneous Exercise

Question:1 Solve the inequality 2\leq 3x-4\leq5

Answer:

Given : 2\leq 3x-4\leq5


2\leq 3x-4\leq5

\Rightarrow\, \, 2+4\leq 3x\leq 5+4

\Rightarrow\, \, 6\leq 3x\leq 9

\Rightarrow\, \, \frac{6}{3}\leq x\leq \frac{9}{3}

\Rightarrow\, \, 2\leq x\leq 3

Thus, all the real numbers greater than equal to 2 and less than equal to 3 are solutions to this inequality.

Solution set is \left \[2,3 \right \]

Question:2 Solve the inequality 6 \leq -3(2x - 4) < 12

Answer:

Given 6 \leq -3(2x - 4) < 12

6 \leq -3(2x - 4) < 12

\Rightarrow\, \ \frac{6}{3}\leq -(2x-4)< \frac{12}{3}

\Rightarrow\, \ -2\geq (2x-4)> -4

\Rightarrow\, \ -2+4\geq 2x> -4+4

\Rightarrow\, \ 2\geq 2x> 0

\Rightarrow\, \ 1\geq x> 0

Solution set is (01]

Question:3 Solve the inequality -3 \leq 4 - \frac{7x}{2}\leq 18

Answer:

Given -3 \leq 4 - \frac{7x}{2}\leq 18


\Rightarrow \, \, -3 \leq 4 - \frac{7x}{2}\leq 18

\Rightarrow \, \, -3-4 \leq - \frac{7x}{2}\leq 18-4

\Rightarrow \, \, -7 \leq - \frac{7x}{2}\leq 14

\Rightarrow \, \, 7 \geq \frac{7x}{2} \geq -14

\Rightarrow \, \, 7\times 2 \geq 7x\geq -14\times 2

\Rightarrow \, \, 14 \geq 7x \geq -28

\Rightarrow \, \, \frac{14}{7} \geq x \geq \frac{-28}{7}

\Rightarrow \, \, 2 \geq x \geq -4

Solution set is [-4,2]

Question:4 Solve the inequality -15 < \frac{3(x-2)}{5} \leq 0

Answer:

Given The inequality

-15 < \frac{3(x-2)}{5} \leq 0


-15 < \frac{3(x-2)}{5} \leq 0

\Rightarrow\, \ -15\times 5< 3(x-2)\leq 0\times 5

\Rightarrow\, \ -75< 3(x-2)\leq 0

\Rightarrow\, \ \frac{-75}{3}< (x-2)\leq \frac{0}{3}

\Rightarrow\, \ -25< (x-2)\leq 0

\Rightarrow\, \ -25+2< x\leq 0+2

\Rightarrow\, \ -23< x\leq 2

The solution set is (-23,2]

Question:5 Solve the inequality -12<4-\frac{3x}{-5} \leq 2

Answer:

Given the inequality

-12<4-\frac{3x}{-5} \leq 2


-12<4-\frac{3x}{-5} \leq 2

\Rightarrow\, \, -12-4< -\frac{3x}{-5}\leq 2-4

\Rightarrow\, \, -16< -\frac{3x}{-5}\leq -2

\Rightarrow\, \, -16< \frac{3x}{5}\leq -2

\Rightarrow\, \, -16\times 5< 3x\leq -2\times 5

\Rightarrow\, \, -80< 3x\leq -10

\Rightarrow\, \, \frac{-80}{3}< 3x\leq \frac{-10}{3}

Solution set is (\frac{-80}{3}, \frac{-10}{3}]

Question:6 Solve the inequality 7 \leq \frac{(3x+ 11)}{2}\leq 11

Answer:

Given the linear inequality

7 \leq \frac{(3x+ 11)}{2}\leq 11

7 \leq \frac{(3x+ 11)}{2}\leq 11

\Rightarrow \, \, 7\times 2 \leq (3x+ 11)\leq 11\times 2

\Rightarrow \, \, 14 \leq (3x+ 11)\leq 22

\Rightarrow \, \, 14-11 \leq (3x)\leq 22-11

\Rightarrow \, \, 3 \leq 3x\leq 11

\Rightarrow \, \, 1 \leq x\leq \frac{11}{3}

The solution set of the given inequality is [1,\frac{11}{3}]

Question:7 Solve the inequality and represent the solution graphically on number line. 5x + 1 > -24,\ 5x - 1 <24

Answer:

Given : 5x + 1 > -24,\ 5x - 1 <24


5x + 1 > -24\, \, \, \, \, \, \, and\, \, \, \, \, \, \ 5x - 1 <24

\Rightarrow 5x > -24-1\, \, \, \, \, \, \, and\, \, \, \, \, \, \ 5x <24+1

\Rightarrow 5x > -25\, \, \, \, \, \, \, and\, \, \, \, \, \, \ 5x <25

\Rightarrow x > \frac{-25}{5}\, \, \, \, \, \, \, and\, \, \, \, \, \, \ x <\frac{25}{5}

\Rightarrow x > -5\, \, \, \, \, \, \, and\, \, \, \, \, \, \ x <5

(-5,5)

The solution graphically on the number line is as shown :

1635763658335

Question:8 Solve the inequality and represent the solution graphically on number line. 2(x-1)<x+5,\ 3(x+2)> 2 -x

Answer:

Given : 2(x-1)<x+5,\ 3(x+2)> 2 -x


2(x-1)<x+5\, \, \, \, and\, \, \, \, \, \ 3(x+2)> 2 -x

\Rightarrow \, \, 2x-2<x+5\, \, \, \, and\, \, \, \, \, \ 3x+6> 2 -x

\Rightarrow \, \, 2x-x<2+5\, \, \, \, and\, \, \, \, \, \ 3x+x> 2 -6

\Rightarrow \, \, x<7\, \, \, \, and\, \, \, \, \, \ 4x> -4

\Rightarrow \, \, x<7\, \, \, \, and\, \, \, \, \, \ x> -1

(-1,7)

The solution graphically on the number line is as shown :

1635763681053

Question:9 Solve the inequality and represent the solution graphically on number line. 3x - 7 > 2(x-6),\ 6-x > 11 - 2x

Answer:

Given : 3x - 7 > 2(x-6),\ 6-x > 11 - 2x


3x - 7 > 2(x-6)\, \, \, \, and\, \, \, \, \, \ 6-x > 11 - 2x

\Rightarrow \, \, 3x - 7 > 2x-12\, \, \, \, and\, \, \, \, \, \ 6-x > 11 - 2x

\Rightarrow \, \, 3x - 2x >7-12\, \, \, \, and\, \, \, \, \, \ 2x-x > 11 - 6

\Rightarrow \, \, x >-5\, \, \, \, and\, \, \, \, \, \ x > 5

x\in (5,\infty )

The solution graphically on the number line is as shown :

1635763701201

Question:10 Solve the inequality and represent the solution graphically on number line.

5(2x-7)-3(2x+3)\leq 0,\quad 2x + 19 \leq 6x +47

Answer:

Given : 5(2x-7)-3(2x+3)\leq 0,\quad 2x + 19 \leq 6x +47


5(2x-7)-3(2x+3)\leq 0\, \, \, \, \, and\, \, \, \, \, \, \, \quad 2x + 19 \leq 6x +47

\Rightarrow \, \, 10x-35-6x-9\leq 0\, \, \, \, \, and\, \, \, \, \, \, \, \quad 2x -6x\leq 47-19

\Rightarrow \, \, 4x-44\leq 0\, \, \, \, \, and\, \, \, \, \, \, \, \quad -4x\leq 28

\Rightarrow \, \, 4x\leq 44\, \, \, \, \, and\, \, \, \, \, \, \, \quad 4x\geq - 28

\Rightarrow \, \, x\leq 11\, \, \, \, \, and\, \, \, \, \, \, \, \quad x\geq - 7

x\in [-7,11]

The solution graphically on the number line is as shown :

1635763730673

Question:11 A solution is to be kept between 68° F and 77° F. What is the range in temperature in degree Celsius (C) if the Celsius / Fahrenheit (F) conversion formula is given by F = \frac{9}{5}C + 32

Answer:

Since the solution is to be kept between 68° F and 77° F.

68< F< 77

Putting the value of F = \frac{9}{5}C + 32 , we have

\Rightarrow \, \, \, 68< \frac{9}{5}C + 32< 77

\Rightarrow \, \, \, 68-32< \frac{9}{5}C < 77-32

\Rightarrow \, \, \, 36< \frac{9}{5}C < 45

\Rightarrow \, \, \, 36\times 5< 9C < 45\times 5

\Rightarrow \, \, \, 180< 9C < 225

\Rightarrow \, \, \, \frac{180}{9}< C < \frac{225}{9}

\Rightarrow \, \, \, 20< C < 25

the range in temperature in degree Celsius (C) is between 20 to 25.

Question:12 A solution of 8% boric acid is to be diluted by adding a 2% boric acid solution to it. The resulting mixture is to be more than 4% but less than 6% boric acid. If we have 640 litres of the 8% solution, how many litres of the 2% solution will have to be added?

Answer:

Let x litres of 2% boric acid solution is required to be added.

Total mixture = (x+640) litres

The resulting mixture is to be more than 4% but less than 6% boric acid.

\therefore \, 2\%x+8\%\, of\, 640> 4\%\, of\, (640+x) and 2\%x+8\%\, of\, 640< 6\%\, of\, (x+640)

\Rightarrow \, 2\%x+8\%\, of\, 640> 4\%\, of\, (640+x) and 2\%x+8\%\, of\, 640< 6\%\, of\, (x+640)

\Rightarrow \, \frac{2}{100}x+(\frac{8}{100}) 640> \frac{4}{100} (640+x) \Rightarrow \, \frac{2}{100}x+(\frac{8}{100}) 640< \frac{6}{100} (640+x)

\Rightarrow \, 2x+5120> 4x+2560 \Rightarrow \, 2x+5120< 6x+3840

\Rightarrow \, 5120-2560> 4x-2x \Rightarrow \, 5120-3840< 6x-2x

\Rightarrow \, 2560> 2x \Rightarrow \, 1280< 4x

\Rightarrow \, 1280> x \Rightarrow \, 320< x

Thus, the number of litres 2% of boric acid solution that is to be added will have to be more than 320 and less than 1280 litres.

Question:13 How many litres of water will have to be added to 1125 litres of the 45% solution of acid so that the resulting mixture will contain more than 25% but less than 30% acid content?

Answer:

Let x litres of water is required to be added.

Total mixture = (x+1125) litres

It is evident that amount of acid contained in the resulting mixture is 45% of 1125 litres.

The resulting mixture contain more than 25 % but less than 30% acid.

\therefore \, 30\%\, of\, (1125+x) > 45\%\, of\, (1125) and 25\%\, of\, (1125+x)< 45\%\, of\, 1125

\Rightarrow \, 30\%\, of\, (1125+x) > 45\%\, of\, (1125) and 25\%\, of\, (1125+x)< 45\%\, of\, 1125

\Rightarrow \, \frac{30}{100}(1125+x)> \frac{45}{100} (1125) \Rightarrow \, (\frac{25}{100}) (1125+x)< \frac{45}{100} (1125)

\Rightarrow \, 30\times 1125+30x> 45\times (1125) \Rightarrow \, 25 (1125+x)< 45(1125)

\Rightarrow \, 30x> (45-30)\times (1125) \Rightarrow \, 25 x< (45-25)1125

\Rightarrow \, 30x> (15)\times (1125) \Rightarrow \, 25 x< (20)1125

\Rightarrow \, x> \frac{15\times 1125}{30} \Rightarrow \, x< \frac{20\times 1125}{25}

\Rightarrow \, x> 562.5 \Rightarrow \, x< 900

Thus, the number of litres water that is to be added will have to be more than 562.5 and less than 900 litres.

Question:14 IQ of a person is given by the formula IQ= \frac{MA}{CA}\times 100 where MA is mental age and CA is chronological age. If 80\leq IQ\leq140 for a group of 12 years old children, find the range of their mental age.

Answer:

Given that group of 12 years old children.

80\leq IQ\leq140

For a group of 12 years old children, CA =12 years

IQ= \frac{MA}{CA}\times 100

Putting the value of IQ, we obtain

80\leq IQ\leq140

\Rightarrow \, \, 80\leq \frac{MA}{CA}\times 100\leq140

\Rightarrow \, \, 80\leq \frac{MA}{12}\times 100\leq140

\Rightarrow \, \, 80\times 12\leq MA\times 100\leq140\times 12

\Rightarrow \, \, \frac{80\times 12}{100}\leq MA\leq \frac{140\times 12}{100}

\Rightarrow \, \, 9.6\leq MA\leq 16.8

Thus, the range of mental age of the group of 12 years old children is \, \, 9.6\leq MA\leq 16.8

More About NCERT Solutions for Class 11 Maths Chapter 6 Miscellaneous Exercises

Question number 1 to 6 of miscellaneous exercise chapter 6 Class 11 is to solve linear inequalities in one variable. Question number 7 to 10 gives graphical solutions of linear inequalities in one variable. The remaining questions are applications of linear equations and are illustrated in NCERT solutions for Class 11 Maths chapter 6 miscellaneous exercise.

Also Read| Linear Inequalities Class 11th Notes

Benefits of NCERT Solutions for Class 11 Maths Chapter 6 Miscellaneous Exercises

  • Students can practice all the questions of miscellaneous exercise chapter 6 Class 11 to revise the chapter.

  • All the questions in the Class 11 Maths Chapter 6 miscellaneous exercise solutions are equally important and students should solve the first three exercises prior to NCERT solutions for Class 11 Maths Chapter 6 miscellaneous exercise.

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Topics Covered in Miscellaneous Exercise Class 11 Chapter 6

The Miscellaneous Exercise in NCERT Solutions for Class 11 Maths Chapter 6 - Linear Inequalities covers key topics such as:

  1. Introduction to Linear Inequalities
  2. Inequalities
  3. Algebraic Solutions of Linear Inequalities in One Variable and Their Graphical Representation

The class 11 chapter 6 miscellaneous exercise solutions align with the latest CBSE guidelines, offering students a comprehensive approach to mastering the subject. Regular practice with these questions not only follows CBSE recommendations but also boosts students' confidence, making it essential for those aiming for high scores in the Maths board examination. Regular and thorough practice of NCERT Solutions for Class 11 Maths is crucial for success.

Key Features of Class 11 Maths ch 6 Miscellaneous Exercise Solutions

  1. Comprehensive Coverage: Class 11 Chapter 6 maths miscellaneous solutions address all the miscellaneous exercise problems in Chapter 6, ensuring comprehensive coverage of the topics.

  2. CBSE Guidelines: The class 11 maths miscellaneous exercise chapter 6 solution are designed in accordance with the latest CBSE guidelines, ensuring relevance to the prescribed curriculum.

  3. Clarity and Accuracy: Class 11 maths ch 6 miscellaneous exercise solutions are presented with clarity and accuracy to facilitate better understanding for students.

  4. Step-by-Step Approach: Each problem is solved in a step-by-step manner, providing a clear and logical progression to aid in better comprehension.

  5. Graphical Representation: Class 11 Chapter 6 miscellaneous exercise solutions include graphical representations where applicable, helping students visualize concepts and solutions.

  6. Relevance to Board Examination: The Class 11 chapter 6 maths miscellaneous solutions are tailored to help students prepare effectively for the Class 11 Maths board examination, aligning with the exam pattern and question types.

  7. Accessible PDF Format: The solutions are available in a PDF format, offering convenience for students to use them according to their preferences and ease of access.

Also see-

NCERT Solutions of Class 11 Subject Wise

Subject Wise NCERT Exampler Solutions

Frequently Asked Questions (FAQs)

1. What is the relation between degree Celsius (C) and Fahrenheit (F)?

F=9C/5+32

2. What is question number 11 of NCERT solutions for Class 11 Maths chapter 6 miscellaneous exercise?

It’s about finding the range of temperature in degrees Celsius. Given the range of Fahrenheit.

3. What is the solution of 3x-6=0?

3x-6=0

3x=6

x=2

4. Give the solutions of 3x-6≥0

The solution is  3x≥6

Or x ≥ 2. The solution is the right-hand side of the line x=2 including the points on the line. The graphical representation is given in the NCERT Class 11 Maths book chapter 6 example 10.

5. What is the difference between the solutions of x ≥ 2 and x>2?

Both inequalities have solutions to the right of the line x=2. For x ≥ 2 points on the line x=2 are included and for x>2 points on the linex=2 are excluded.

6. How can you represent x>120 and x<300 as a double inequality?

120<x<300

7. How many exercises are solved in NCERT syllabus chapter 6 Class 11?

4 exercises are discussed in NCERT Class 11 Maths chapter 6

8. How many questions are solved in the Class 11 Maths chapter 6 miscellaneous exercise solutions?

Fourteen questions are solved in Linear Inequality Class 11 NCERT Maths chapter 6 miscellaneous exercise

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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)

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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 .

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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

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remain unchanged

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be a function of the molecular mass of the substance.

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Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

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Mole fraction.

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twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

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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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