Question

5. If radius and height, both of a right circular cone be doubled, which of the following
will be the ratio between the volumes of new solid and original solid ?
(b) 1:2
(c) 6:1
(d) 8:1
(a) 2:1​

Answer 1

d)8:1

Step-by-step explanation:

original volume=1/3 pi*r^2*h

new volume=8*1/3 pi*r^2*h

hence,

new volume/original volume=8