RD Sharma Solutions Class 9 Surface Area And Volume Of Right Circular Cone

RD Sharma Solutions Class 9 Chapter 20

RD Sharma Solutions Class 9 Chapter 20

RD Sharma Solutions Class 9 Chapter 20 comes with questions and answers related to cone and its dimensions.

Area: In a 2d space, the occupied space by the flat surface is known as area. It is measure in square units.

For 2D figures, areas can be of two types, Total curved surface area and surface area of a right circular cone:

Total surface area: The total area occupied by the surface including the curved part and the base(s).

Curved surface area: The area occupied by the surface excluding the base(s) is known as curved surface area.

Volume: The space occupied by an object, which is measured in cubic units.

A right circular cone is a one having a circular base. Consider a right circular cone having ‘r’ as the base area, ‘h’ as the height of a cone and ‘l’ as a slant height. Then, Total surface area = πr(r+l), Curved surface area = πrl and Volume = 13πr2h

Check the detailed RD Sharma solutions for class 9 for the chapter “Surface areas and volumes of a right circular cone” given below. The RD Sharma class 9 solutions are given in the following table.


Class 9


Chapter 20


Surface Area and Volume of Right Circular Cone



RD Sharma Class 9 Maths Solutions – Chapter 20

Here you will find several exercises of class 9 maths chapter 20 -Surface Area and Volume of Right Circular Cone. Click on the links to access the maths exercises from the table

Practise This Question

Krishnan bought chocolates for his brothers. When he grouped the chocolates in groups of 4, 1 chocolate was left, if grouped in 5, 4 chocolates were left, If grouped in 6, 1 chocolate was left and if  grouped in 7, no chocolate was left ungrouped. If the total number of chocolates bought was less than 50, find the number of chocolates Krishnan bought.