Question

1 point
Q16. The area of circular base of a
right circular cone is 78.5 sq. cm . If
its height is 12 cm then its volume is
31.4 cubic cm
3.14 cubic cm
314 cubic cm
none of these​

Answer 1

Answer:

301.72cm^3

Step-by-step explanation:

base area (a)=78.5sqcm

height(h)=12cm

area =πr^2

78.5 =22/7*r^2

r^2=785*7/(22*10)

r^2=24.97

r=4.9

volume (v)=πr^2*h/3

=22/7*24.97*12/3

=301.72 cm^3