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RD Sharma Solutions for Class 9 Maths Chapter 20 - Surface Area and Volume of A Right Circular Cone

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Last updated date: 26th Feb 2024
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RD Sharma Class 9 Maths Surface Area and Volume of A Right Circular Cone Solutions - Free PDF Download

Free PDF download of RD Sharma Solutions for Class 9 Maths Chapter 20 - Surface Area and Volume of A Right Circular Cone solved by Expert Mathematics Teachers on Vedantu.com. All Chapter 20 - Surface Area and Volume of A Right Circular Cone Exercise Questions with Solutions to help you to revise complete Syllabus and Score More marks. Register for online coaching for JEE (Mains & Advanced), NEET, Engineering and Medical entrance exams. You can also register Online for Class 9 Science tuition on Vedantu.com to score more marks in your examination. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for the better solutions ,they can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations

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Class 9 RD Sharma Textbook Solutions Chapter 20 - Surface Area and Volume of A Right Circular Cone

In this Chapter 20 - Surface Area and Volume of A Right Circular Cone, several exercise questions with solutions for RD Sharma Class 9 Maths are given to help the students and understand the concepts better. 


We have provided step by step solutions for all exercise questions given in the pdf of Class 9 RD Sharma Chapter 20 - Surface Area and Volume of A Right Circular Cone. All the Exercise questions with solutions in Chapter 20 - Surface Area and Volume of A Right Circular Cone are given below:

Exercise 20.1

Exercise 20.2


At Vedantu, students can also get Class 9 Maths Revision Notes, Formula and Important Questions and also students can refer the complete Syllabus & Sample Paper for Class 9 Maths to prepare for their examination to score more marks.

FAQs on RD Sharma Solutions for Class 9 Maths Chapter 20 - Surface Area and Volume of A Right Circular Cone

1. Why is it important to refer to RD Sharma class 9 Maths Solutions for chapter 20 from Vedantu?

RD Sharma is one of the most preferred reference textbooks. Vedantu experts explain the solutions of the Rd Sharma book in a very simple manner which will help the students understand the concepts easily. It covers all the topics and provides questions for practice. The students can get the downloadable pdf of the textbook solutions. RD Sharma Class 9 Maths solutions help students to score excellent marks in examinations. The solutions of RD Sharma are explained in a step-by-step manner by Vedantu experts which clears every doubt that may arise while studying.

2. How do RD Sharma class 9 maths solutions from Vedantu help students in getting a good hold of the surface area and volume of a right circular cone?

RD Sharma class 9 maths solutions are accurate as all the formulas used in the solutions are properly explained. Vedantu gives answers to all the questions in the exercise, which helps the students get good marks and deep knowledge of the concept.

3. What is the number of surfaces a right circular cone has?

A right circular cone has two surfaces such as a curved surface area and a total surface area.


The area occupied by the curved surface of a right circular cone is referred to as the curved surface area of the cone. As a result, when we talk about the curved surface area of a right circular cone, we don't include the area of the base. The lateral surface area is another name for the curved surface area.


The region or area of the entire surface of a right circular cone, including the base area, is referred to as the total surface.

4. How To differentiate between a right circular cone and a cone?

A cone is a three-dimensional solid with a vertex or apex and a circular base. The cone in which the axis line is parallel to the base is known as a right circular cone. It has a curved surface as well as a flat surface. The vertex or apex of the cone is where the curved surfaces of the cone intersect.

5. What are the formulas to find the curved surface area, total surface area, and volume of the right circular cone?

The curved surface area(CSA) of the right circular cone, CSA= $\pi rl$ unit square 

The total surface area is the sum of the areas of all the faces. Here with respect to the right circular cone,\[\pi {r^2} + \pi rl\] =\[\pi r(r + l)\] is the formula for calculating a cone's surface area. In this equation, r stands for the radius of the circular base, h for the height of the cone, l for the height of the slant, and is around 3.14. The equation \[l = {r^2} + {h^2}\] can be used to determine the slant height if it is not specified.

The volume of the right circular cone is given by the formula,\[V = \frac{1}{3}\pi {r^2}h\]

where,

 r - radius of the circular base, 

h - the height of the cone.