Question

find the volume of a cone who's radius is 7cm and slant height is 25cm

Answer 1

First find height.

r² + h² = l²

7² + h² = 25²

h² = 625 - 49 = 576

h = 24 cm .

Volume of cone = 1/3πr²h

= 1/3 * 22/7 * 7 * 7 * 24

= 8*22*7

= 1232 cm³

Answer 2

slanght hight=√r²+h²
25=√49+h²
squaring both side
625=49+h²
h²=576
h=24

volume of cone =1/3πr²h
=1/3×22/7×7²×24
=22×7×8
=1232cm³