Question

Answering these 3 questions

Answer 1

1)
Volume of a cone is 1/3×πr^2h=1/3×2^2×3×π=4πcm^3

And volume of cylinder is π×r^2h=24πcm^3
Add them 28π=28×3.14=87.92 or 88cm^3

2)

V=4/3πr^3
V=4500π ft^3

3)
V=4/3πr^3
Its given
972π=4/3π×(d/2)^3 
972=4/3×d^3/8
972×8×3/4=d^3

d=18inches