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August 8, 202239 Insightful Publications

**Exercise 13.4 Class 9 Maths**: NCERT solutions of Exercise 13.4, class 9, Maths deals with fundamentals of the sphere, hemisphere and its surface areas and volumes. The exercise includes solved problems from the NCERT books which are in detail. The solutions are created by the subject matter experts at Embibe who have a great understanding of geometrical figures and explanations. The solutions are designed as per the CBSE guidelines.

NCERT Solutions for exercise 13.4 class 9, maths provided by Embibe include in a very detailed and comprehensible manner to help students understand conceptually and score better in their final exams. Candidates can download the free PDFs. In this article, we will provide NCERT for surface areas and volumes, exercise 13.4, class 9 maths in the PDF format, important questions and the advantages of NCERT solutions from Embibe.

As stated above NCERT solutions for class 9 maths, chapter 13, exercise 13.4 are curated by the experts that are available in PDF format. Students can download and read it in offline mode also. They can also save it for future reference. Before moving to the benefits and the chapter. Let’s focus on the overview:

Board | CBSE |

Textbook | NCERT |

Class | Class 9 |

Language | English |

Subject | Maths |

Chapter | Chapter 13 |

Chapter Name | Surface Areas and Volumes |

Exercise | Ex 13.4 |

Category | NCERT Solutions |

Official Website | https://ncert.nic.in/ |

Students can study for class 9th examinations from the solutions by practicing the questions provided in the textbooks. It will help students get an idea about the chapter surface areas and volumes. students can download the PDFs for free and revise them on a regular basis. These solutions will help students prepare for their examinations and secure flying colours.

**DOWNLOAD NCERT SOLUTIONS FOR SURFACE AREAS AND VOLUMES EXERCISE 13.4 CLASS 9 MATHS**

NCERT Solutions for class 9 maths, chapter 13, Exercise 13.4 is focused on the surface area and volume of the sphere. The surface area is calculated by the product of 4 times the area of the circle. Radius is the distance between the surface and centre of the sphere. Diameter is the distance between one point to another point on the surface. In this exercise, the total area covered by the surface of the sphere in a three-dimensional space is called a surface area. The space occupied by the sphere is known as the volume of the sphere. The topics and subtopics of surface area and volumes are given below:

- Surface Areas And Volumes
- Introduction
- Surface Area of a Cuboid and a Cube
- Surface Area of a Right Circular Cylinder
- Surface Area of a Right Circular Cone
- Surface Area of a Sphere
- The volume of a Cuboid
- The volume of a Cylinder
- The volume of a Right Circular Cone
- The volume of a Sphere
- Summary

The diameter is given by 2r where R is the radius of the sphere.

There are many benefits of studying from NCERT Solutions for Class 9 Maths Chapter 13, exercise 13.4. The benefits of studying the NCERT solutions by Embibe are given below:

- NCERT solution for class 9 maths, helps students in finding the radius and diameter of a sphere and the hemisphere by a formula of both surface area and hemisphere.
- Exercise 13.4 class 9, the geometrical questions are explained clearly with figures and step-wise procedure to help students understand clearly and get more marks.
- Solving these NCERT solutions for surface and area, class 9, exercise 13.4, students can analyse their and enhance their performance in our grades in the first and second term.
- The formulas for calculating surface area and volume can help students in competitive exams like NEET and JEE Main/Advanced.
- The NCERT solutions provided by Embibe are free of cost. Students can download the solutions with ease and save them for future reference.
- The solutions provided by Embibe are created by the subject matter experts who have a vast knowledge of the chapter and an in-depth understanding of the concepts.
- NCERT solutions also help them solve their homework problems on time.
- The solutions are comprehensive and made easy so that no concept is left out.
- Students can revise the solutions in the offline mode regularly till their exam.
- NCERT solutions by Embibe has various types of questions like short answers, long answer and MCQs.

The important questions for exercise 13.4 class 9 are given below:

- Find the surface area of a sphere of radius: 10.5 cm, 14 cm and 5.6 cm.
- Find the surface area of the diameter: 14 cm, 21 cm and 3.5 cm.
- Find the total surface area of a hemisphere of radius 10 cm.
- The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.
- A hemispherical bowl made of brass has an inner diameter. Find the cost of tin-plating it on the inside at the rate of Rs 16 per.
- Find the radius of the sphere whose surface area is 154 cms.
- The diameter of the moon is approximately one fourth of the diameter of the earth. Find the ratio of their surfaces.
- A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowl is 5 cm. Find the outer curved surface area of the bowl.
- The right circular cylinder just encloses a sphere of radius r. Find the surface area of the sphere.
- A right circular cylinder just encloses a sphere of radius r. Find the curved surface area of the cylinder.
- A right circular cylinder just encloses a sphere of radius r. Find the ratio of the areas obtained.

The frequently asked questions related to Surfaces and Volumes Class 9 Maths Chapter 13 Exercise 13.4 are given below

**Q1: Where can the students download NCERT solutions for Exercise 13.4, Chapter 13, and Exercise 13.4?****Ans**: Students can download NCERT solutions for exercise 13.4, chapter 13, class 9 maths from the above article.

**Q2: What does Exercise 13.4, class 9, maths chapter 13 deal with?****Ans**: Exercise 13.4, class 9, maths deals with concepts of the sphere, hemisphere and its surfaces and volumes.

**Q3: What is a sphere as per NCERT solutions for class 9 maths, chapter 13, exercise 13.4?****Ans**: The three-dimensional object with a round shape is called a sphere as per NCERT solutions for class 9 maths, Exercise 13.4.

**Q4: What are the different types of surface areas?****Ans**: The two types of surface areas are

- Area of the lateral surface
- Area of the total surface

**Q5: What is the surface area of the sphere?****Ans**: The surface area of the sphere is 4πr2.

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I hope the above article about the NCERT Solutions for Surface Areas and Volumes Exercise 13.4 Class 9 Maths is informative for the students preparing for class 9 CBSE exams. Take mock tests provided by Embibe. Any queries or suggestions, drop in the below comments and we will respond to you soon.