In NCERT solutions for class 9 maths chapter 11 Surface Areas & Volumes, you will learn how to calculate the surface areas and volume of cuboids, cylinders, cones, and spheres, as these figures help in understanding the space occupied by a solid, which is very useful in everyday life. These NCERT solutions for class 9 maths chapter 11 Surface Areas and Volumes will help you get a better grasp on the concepts.

Surface area is the area of the surface of an object, while volume is the area of space within a void or solid. The students need to keep in mind that the area is calculated in square units, while the volume is calculated in cube units. This chapter contains many important formulas and exercises based on that formulas.

NCERT solutions for class 9 maths chapter 11 are prepared by mathematics teaching faculties of eSaral with years of teaching experience and subject matter expertise. These solutions are designed with a concept-driven approach. The purpose of NCERT solutions for class 9 maths chapter 11 is primarily to serve as a guide and useful reference to assist students in resolving their doubts effectively. NCERT solutions for class 9 maths chapter 11 are available for free to download in PDF format on eSaral's official website.

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## Important Topics covered in Chapter 11 - Surface Areas and Volumes

The NCERT solutions for class 9 maths chapter 11 include the following topics:

11.1 Surface Area of a Right Circular Cone |

11.2 Surface Area of a Sphere |

11.3 Volume of a Right Circular Cone |

11.4 Volume of a Sphere |

**11.1 Surface Area of a Right Circular Cone - **This section provides an overview of the cone, which is composed of a triangle and a circle. The cone formula is derived from the combination of the two areas, respectively chapter 11 Surface Area and Volume.

Curved Surface Area of a Cone = ½ × l ×2πr = πrl

Total Surface Area of a Cone = πrl + 2πr = πr (l + r)

**11.2 Surface Area of a Sphere -** In this section, students can learn the formula and method for determining the sphere's surface area. NCERT solutions for class 9 maths chapter 11 provide a comprehensive explanation of the concept and a practical exercise for the students.

Surface Area of a Sphere = 4 πr2.

**11.3 Volume of a Right Circular Cone - **Maths Class 9 of Chapter 11 gave the students an activity to help them understand the difference between cylinders and cones. From that, they derived a formula for the volume of a con.

formula for the volume of a cone = ⅓ πr2h

**11.4 Volume of a Sphere - **NCERT Solutions for class 9 math is about figuring out the volume of a sphere.

Formula for the volume of a sphere = 4/3πr3

## NCERT Solutions for Class 9 Maths Chapter 11 Exercises

You can find a detailed exercise-wise analysis of NCERT solutions for class 9 maths chapter 11 Surface Areas and Volumes below, which basically shows how many questions each section chapter 11 contains.

Exercise 11.1 | 8 Questions & Solutions |

Exercise 11.2 | 9 Questions & Solutions |

Exercise 11.3 | 9 Questions & Solutions |

Exercise 11.4 | 10 Questions & Solutions |

## Benefits of Downloading The NCERT Solutions for Class 9 Maths Chapter 11 - Surface Areas and Volumes

The NCERT solutions offer a complete solution to help students learn this chapter. Here, you are going to look at the benefits of downloading the NCERT solutions for class 9 math chapter 11 Surface Areas and Volumes.

NCERT solutions are designed to break down these problems into manageable steps and guide students through the process of solving them.

The NCERT solutions offer a variety of practice problems that relate to different aspects of the chapter. Students can practice these problems to strengthen their knowledge of the concepts and improve their problem-solving abilities.

Class 9 chapter 11 maths NCERT solutions will help you solve the problems in a better way and save you time and effort.

Once you have finished NCERT solutions for class 9 maths chapter 11, you will be able to easily and confidently differentiate between the areas and the volumes of different figures.

#### Frequently Asked Questions

**Question 1. How can I use NCERT solutions for class 9 maths chapter 11 effectively ?**

**Answer 1.** NCERT solutions for class 9 maths chapter 11 is made up of simple exercises that will help students learn how to measure surface areas and volumes. They have to read the whole chapter because every single line has important information or facts in it. In order to learn how to solve problems and apply the geometrical formulas, they must practice the questions provided in chapter.

**Question 2. What topics are included in the NCERT solution for class 9 maths chapter 11?**

**Answer 2. **NCERT solutions for class 9 maths chapter 11 covers the following topics:

Surface Area of a Right Circular Cone

Surface Area of a Sphere

Volume of a Right Circular Cone

Volume of a Sphere

In Class 9 chapter 11, the students are focused on the shapes of various solids. There are many formulas for determining the surface area and the volume of different shapes which are useful in the real world.