CBSE Notes, Lectures

CBSE - Mathematics - Surface Areas and Volumes

Surface Areas and Volumes

NCERT Exercise Exercise 13.7

A right triangle ABC with sides 5 cm, 12 cm and 13 cm is revolved about the side 12 cm. Find the volume of the solid so obtained.

Given; h = 12 cm, r = 5 cm
Volume of cone = 1/3 π r2 h
= (1/3) π X 52 X 12 = 100 π cubic cm

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