 Most Affordable JEE | NEET | 8,9,10 Preparation by Kota's Top IITian Doctor Faculties

# NCERT Solutions for Class 8 Maths Chapter 9 Exercise 9.2 Mensuration - PDF Download NCERT solutions for class 8 maths chapter 9 ex 9.2 Mensuration introduces a new concept of surface area of solid shapes. Solid or 3D shapes used are cubes, cuboids, and cylinders. Basically, the total surface area is the sum of all the surfaces on a solid surface. It is a fact that students often encounter that these surface area formulas are obtained from plane figures. This means that you need to have a good understanding of the shapes learned in the previous classes in order to solve these questions.

Class 8 maths chapter 9 exercise 9.2 NCERT solutions consists of 10 problems and the difficulty level of questions ranges from easy to medium. One of the most important skills that students must have in order to solve this exercise is the ability to visualize shapes. Ex 9.2 class 8 maths solutions are prepared by subject experts of eSaral. These solutions are available in free PDF format which can be downloaded from eSaral. You can download the PDF to practice questions anytime.

## Topics Covered in Exercise 9.2 Class 8 Mathematics Questions

In ex 9.2 of chapter 9 mensuration, Identify solid shape and surface area of a cube, cuboid and cylindrical shape. After practicing these problems, students will be able to identify 3D geometrical figures and calculate their area.

 1 Solid Shapes 2 Surface Area of Cube, Cuboid and Cylinder Cuboid Cube Cylinders
1. Solid Shapes - Solid shapes are 3-dimensional shapes that occupy a certain amount of space. Examples of solid shapes include cubes, cylindrical shapes, and spherical shapes.

2. Surface Area of Cube, Cuboid and Cylinder

Surface Area - If we draw a net of a solid shape, we can clearly see that all the faces are present, and if we are adding up all the areas of the faces, we can get the total area of this solid shape.

Lateral or Curved Surface Area - If we take out the bottom and top faces of a solid shape, then the area of remainder of the figure represents the lateral surface of the figure.

• Surface Area of Cuboid

Lateral surface area of cuboid = 2h(l+b)           (Where l = length, b = breadth, h = height)

Total surface area of cuboid = 2(lb + bh + hl)

• Surface Area of Cube

Lateral surface area of cube = 4l2      (Where l= edge of the cube)

Total surface area of cube = 6l2

• Surface Area of Cylinders

Lateral surface area of cylinder = 2πrh                 (Where r= radius,  h = height)

Total surface area of cylinder = 2πr(r+h)

## Tips for Solving Exercise 9.2 Class 8 Chapter 9 Mensuration

Solving questions of ex 9.2 class 8 chapter 9 mensuration, you must learn the tips provided by subject experts of eSaral. Here, we have given some of the useful tips to solve this exercise.

1. NCERT solutions class 8 maths chapter 9 ex 9.2 mensuration has three important total surface area formulas which you must remember before solving the questions of ex 9.2.

2. NCERT solutions class 8 maths chapter 9 ex 9.3 provides a general framework for problem solving that utilizes such concepts. This exercise assists students in increasing their calculation speed and precision while developing their reasoning skills.

## Importance of Solving Ex 9.2 Class 8 Maths Chapter 9 Mensuration

Here, eSaral has combined some of the benefits of solving ex 9.2 questions for class 8 maths chapter 9. You can check them below.

1. NCERT solutions for class 8 maths chapter 9 ex 9.2 explains some important formulas of solid shapes which gives you a clear and precise understanding of concepts to solve questions.

2. Every question in NCERT solutions is solved in step by step manner by subject experts of eSaral that helps you in preparing for the exam.

3. All the answers of ex 9.2 questions are provided in PDF format which can be used by you to cross check your answers.

4. NCERT solutions for class 8 maths chapter 9 ex 9.2 is the most reliable study material because it is prepared by a team of experts so that students can solve the questions correctly.

Question 1. Define the solid shapes?

Answer 1. Solid shapes are 3-dimensional shapes that occupy a certain amount of space. Examples of solid shapes include cubes, cylindrical shapes, and spherical shapes.

Question 2. Write the total surface area of a cuboid?

Answer 2. Total surface area of cuboid = 2(lb + bh + hl)

(Where l = length, b = breadth, h = height)

Question 3. Write the lateral surface area of a cylinder?

Answer 3. Lateral surface area of a cylinder = 2rh,   (where r = radius, h = height)