CBSE Notes, Lectures

CBSE - Mathematics - Surface Areas and Volumes

Surface Areas and Volumes

NCERT Exercise Exercise 13.7

Find the volume of the right circular cone with

(i) radius 6 cm, height 7 cm
(ii) radius 3.5 cm, height 12 cm

(i) radius 6 cm, height 7 cm

Given; r = 6 cm, h = 7 cm
Volume of cone = 1/3 π r2h
= (1/3) X (22/7) X 62 X 7 = 264 cubic cm

(ii) radius 3.5 cm, height 12 cm

 Given; r = 3.5 cm, h = 12 cm
Volume of cone = 1/3 π r2 h
= (1/3) X (22/7) X (3.5)2 X 12 = 154 cubic cm

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