CBSE Notes, Lectures

CBSE - Mathematics - Surface Areas and Volumes

Surface Areas and Volumes

NCERT Exercise Exercise 13.7

If the volume of a right circular cone of height 9 cm is 48 π cm3, find the diameter of its base.

Given; volume = 48 π cubic cm, h = 9 cm, r = ?
Volume of cone = 1/3 π r2 h
Or, 48 π = 1/3 π r2 X 9
Or, r2 = 48/3 = 16
Or, r = 4 cm

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