Question

A right triangle with sides 3cm,4cm and 5cm is rotated about the side of 3cm to form a cone. The volume of the cone so formed is
(a) 12πcm^3

(b). 15πcm^3

(c). 16πcm^3

(d). 20 πcm^3​​

Answer 1

Answer is = 12πcm^3
Volume of cone is 1/3πr^2h
1/3 x π x 3^2 x 4
1/3 x π x 9 x 4
36/3π = 12πcm2