Question

The radius and height of a cone are in the ratio 2:5. The area of the base os 154sq cm . Find its volume

Answer 1

Area of Base=πr²
154=πr²
r=7cm

so Height is 7*5/2=17.5cm
So Volume= 1/3πr²h
1/3*22/7*7*7*35/2
5390/6 cm³
2695/3 cm³