RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 20. Surface Area and Volume of a Right Circular Cone

Subject: Mathematics - Class 9th

Q. No. 13 of Exercise 20.2

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The volume of a right circular cone is 9856 cm3. If the diameter of the base is 28 cm, find :

(i) height of the cone

(ii) slant height of the cone

(iii) curved surface area of the cone.

We have,

Volume of right circular cone = 9856 cm3,

Radius of cone = 14 cm

h = 48 cm

slant height l = = = 50 cm

Curved Surface area of cone = πrl =

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