• Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • NCERT Solutions
    • NCERT Books Free Download
  • TS Grewal
    • TS Grewal Class 12 Accountancy Solutions
    • TS Grewal Class 11 Accountancy Solutions
  • CBSE Sample Papers
  • NCERT Exemplar Problems
  • English Grammar
    • Wordfeud Cheat
  • MCQ Questions

CBSE Tuts

CBSE Maths notes, CBSE physics notes, CBSE chemistry notes

NCERT Solutions for Class 8 Maths Chapter 11 Mensuration Ex 11.4

NCERT Solutions for Class 8 Maths Chapter 11 Mensuration Ex 11.4 are part of NCERT Solutions for Class 8 Maths. Here we have given NCERT Solutions for Class 8 Maths Chapter 11 Mensuration Ex 11.4.

  • Mensuration Class 8 Ex 11.1
  • Mensuration Class 8 Ex 11.2
  • Mensuration Class 8 Ex 11.3
Board CBSE
Textbook NCERT
Class Class 8
Subject Maths
Chapter Chapter 11
Chapter Name Mensuration
Exercise Ex 11.4
Number of Questions Solved 8
Category NCERT Solutions

NCERT Solutions for Class 8 Maths Chapter 11 Mensuration Ex 11.4

Ex 11.4 Class 8 Maths Question 1.
Given a cylindrical tank, in which situation will you find surface area and in which situation volume.
(a) To find how much it can hold.
(b) Number of cement bags required to plaster it.
(c) To find the number of smaller tanks that can be filled with water from it.
Solution:
(a) Volume
(b) Surface area
(c) Volume

Ex 11.4 Class 8 Maths Question 2.
Diameter of cylinder A is 7 cm, and the height is 14 cm. Diameter of cylinder B is 14 cm and height is 7 cm. Without doing any calculations can you suggest whose volume is greater? Verify it by finding the volume of both the cylinders. Check whether the cylinder with greater volume also has greater surface area?
NCERT Solutions for Class 8 Maths Chapter 11 Mensuration 32
Solution:

Cylinder B has greater volume.
Surface area of cylinder A
= (2πrh + 2πr2 sq. units,
NCERT Solutions for Class 8 Maths Chapter 11 Mensuration 33
Thus, cylinder having greater volume also has greater surface area.

Ex 11.4 Class 8 Maths Question 3.
Find the height of a cuboid whose base area is 180 cm2 and volume is 900 cm3?
Solution:
Volume of the cuboid =900 cm3
⇒ (Area of the base) x Height = 900 cm3
⇒ 180 x Height = 900
⇒ Height = \(\frac { 900 }{ 180 } \) = 5
Hence, the height of the cuboid is 5 cm.

Ex 11.4 Class 8 Maths Question 4.
A cuboid is of dimensions 60 cm x 54 cm x 30 cm. How many small cubes with side 6 cm can be placed in the given cuboid?
Solution:
NCERT Solutions for Class 8 Maths Chapter 11 Mensuration 34

Ex 11.4 Class 8 Maths Question 5.
Find the height of the cylinder whose volume is 1.54 m3 and diameter of the base is 140 cm?
Solution:
Let the h be the height of cylinder whose radius, r = \(\frac { 140 }{ 2 } \) cm = 70 cm = \(\frac { 70 }{ 100 } \) m and volume =1.54 m3.
NCERT Solutions for Class 8 Maths Chapter 11 Mensuration 35

Ex 11.4 Class 8 Maths Question 6.
A milk tank is in the form of cylinder whose radius is 1.5 m and length is 7 m. Find the quantity of milk in liters that can be stored in the tank?
NCERT Solutions for Class 8 Maths Chapter 11 Mensuration 36
Solution:

Quantity of milk that can be stored in the tank = Volume of the tank
NCERT Solutions for Class 8 Maths Chapter 11 Mensuration 37

Ex 11.4 Class 8 Maths Question 7.
If each edge of a cube is doubled,
(i) how many times will its surface area increase?
(ii) how many times will its volume increase?
Solution:
Let x units be the edge of the cube. Then, its surface area = 6x2 and its volume = x3.
When its edge is doubled,
(i) Its surface area = 6 (2x)2 = 6 x 4 x 2 = 24 x 2
⇒ The surface area of the new cube will be 4 times that of the original cube.
(ii) Its volume = (2x)3 = 8x3.
⇒ The volume of the new cube will be 8 times that of the original cube.

Ex 11.4 Class 8 Maths Question 8.
Water is pouring into a cuboidal reservoir at the rate of 60 liters per minute. If the volume of reservoir is 108 m3, find the number of hours it will take to fill the reservoir.
NCERT Solutions for Class 8 Maths Chapter 11 Mensuration 38
Solution:

Volume of the reservoir =108 m3
= 108 x 1000 litres
= 108000 litres
Since water is pouring into reservoir @ 60 litres per minute
∴ Time taken to fill the reservoir = \(\frac { 108000 }{ 60\times 60 } \) hours
= 30 hours

We hope the NCERT Solutions for Class 8 Maths Chapter 11 Mensuration Ex 11.4 help you. If you have any query regarding NCERT Solutions for Class 8 Maths Chapter 11 Mensuration Ex 11.4, drop a comment below and we will get back to you at the earliest.

Primary Sidebar

NCERT Exemplar problems With Solutions CBSE Previous Year Questions with Solutoins CBSE Sample Papers

Recent Posts

  • NCERT Class 9 Maths Lab Manual – Verify that if Two Lines Intersect each Other
  • ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 15 Circles Ex 15.1
  • Important Questions for CBSE Class 12 Chemistry The Solid State
  • Selina Concise Physics Class 7 ICSE Solutions Chapter 7 Electricity and Magnetism
  • MCQ Questions for Class 10 Geography Chapter 6 Manufacturing Industries with Answers
  • ML Aggarwal Class 8 Solutions for ICSE Maths Chapter 8 Simple and Compound Interest Check Your Progress
  • NCERT Class 9 Maths Lab Manual – Form a Cone from a Sector of a Circle
  • NCERT Solutions for Class 11 Chemistry Chapter 5 States of Matter
  • ML Aggarwal Class 8 Solutions for ICSE Maths Chapter 11 Factorisation Ex 11.1
  • NCERT Solutions for Class 7 Science Chapter 16 Water A Precious Resource
  • ML Aggarwal Class 8 Solutions for ICSE Maths Chapter 10 Algebraic Expressions and Identities Ex 10.5
  • Muhavare in Hindi – मुहावरे (Idioms) (वाक्य प्रयोग) की परिभाषा एवं उनके भेद और उदाहरण (हिन्दी व्याकरण)
  • NCERT Exemplar Class 10 Maths Solutions Chapter 9 Circles
  • How can change of size of eyeball be one of the reason for myopic?
  • Animal Kingdom Class 11 Notes Biology Chapter 4

Footer

Maths NCERT Solutions

NCERT Solutions for Class 12 Maths
NCERT Solutions for Class 11 Maths
NCERT Solutions for Class 10 Maths
NCERT Solutions for Class 9 Maths
NCERT Solutions for Class 8 Maths
NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 6 Maths

SCIENCE NCERT SOLUTIONS

NCERT Solutions for Class 12 Physics
NCERT Solutions for Class 12 Chemistry
NCERT Solutions for Class 11 Physics
NCERT Solutions for Class 11 Chemistry
NCERT Solutions for Class 10 Science
NCERT Solutions for Class 9 Science
NCERT Solutions for Class 7 Science
MCQ Questions NCERT Solutions
CBSE Sample Papers
NCERT Exemplar Solutions LCM and GCF Calculator
TS Grewal Accountancy Class 12 Solutions
TS Grewal Accountancy Class 11 Solutions