NCERT Solutions for Class 9 Maths Chapter 11 Exercise 11.2 Surface Areas and Volumes - PDF Download

NCERT solution for class 9 maths chapter 11 ex 11.2 Surfaces and Volumes describes the concepts of surface area of sphere. It begins with the definition of a circle, and how a three-dimensional circle can be transformed into a sphere using circular paper and string. Students will find that a sphere is similar to a ball's surface. 

Class 9 maths Chapter 11 exercise 11.2 NCERT solutions consists of 8 questions with the concept of finding the surface area of the sphere and total surface area of the hemisphere. Ex 11.2 class 9 maths solutions contains stepwise solved questions. These solutions are prepared by our academic team of mathematics and are accompanied by correct geometrical figures and explanations in step-wise order for better comprehension of the topic.

eSaral offers NCERT solutions for class 9 maths exercise 11.2 in PDF format. You can download these free PDFs as per your requirement or study it directly on our website.

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Topics Covered in Exercise 11.2 Class 9 Mathematics Questions

Ex 11.2 class 9 maths chapter 11 mainly focuses on finding the surface area of the sphere, curved surface area and total surface area of the hemisphere. These topics are explained in detail using appropriate formulas and figures to perform well in CBSE exams.

1. Surface Area of a Sphere

A sphere is a solid shape that is totally round, just like a ball. It has the same curved and total surface area.

 surface area of a sphere of radius r = 4 times the area of a circle of radius r = 4 × (r2) 

                Surface Area of a Sphere = 4r2

2. Curved Surface Area of a Hemisphere

If we split the sphere in half, it is called a hemisphere.

                Curved Surface Area of a Hemisphere = 2r2

3. Total Surface Area of a Hemisphere = 3r2

Tips for Solving Exercise 11.2 Class 9 Chapter 11 Surface Areas and Volumes

Ex 11.2 class 9 maths ch 11 contains questions which are based on formulas of sphere and hemisphere. Our subject experts have provided some very important tips to solve these questions. You can check them below.

1. NCERT solutions for class 9 math ex 11.2 helps in calculating radius and diameter of sphere and hemisphere using formula of total surface of sphere and total surface of hemisphere which gives better comprehension of questions.
2. Students must learn the terms, definitions and related formulas to solve the questions with ease.
3. Solving all the questions outlined inNCERT solutions will enable students to acquire the necessary competencies to progress in ex 11.2.
   

Importance of Solving Ex 11.2 Class 9 Maths Chapter 11 Surface Areas and Volumes

You will get immense benefits of solving questions of ex 11.2 class 9 maths chapter 11 surface areas and volumes. Here, we have explained some of the benefits, which you can check below.

1. NCERT solutions offered by eSaral help you to find the radius of the sphere and total surface area of the hemisphere to solve questions in step by step manner.
2. The questions given in NCERT solutions allow you to solve and revise all the ex 11.2 questions.
3. After solving several questions from the solutions, you can solve all the exam questions from chapter 11 ex 11.2 easily.
4. Once students have studied NCERT solutions with a simple explanation provided by our experts, they will get a good grasp of ex 11.2. 

Frequently Asked Questions

Question 1. Write the surface area of the sphere?

Answer 1. The surface area of sphere is 4 4r2.

Question 2. Write the total surface area of the hemisphere?

Answer 2. The total surface area of hemisphere is 3r2.