Question

1. A water storage tank is in the shape of a hemisphere​ (half a​ sphere). If the radius is 20ft the approximate the volume of the tank in cubic feet

Answer 1

Volume of the tank=16,755 cubic feet

The volume of a sphere is:

4/3 π r^3.

So the volume of a hemisphere is half of that:V = (2 / 3) π r^3.

r=20

V=(2/3)π(20)^3

V=(2/3)π8000

V=16,755 cubic feet