Question

The base of a cylinder water tank has an area of 28 square feet. When the tank is full it holds 140 cubic feet of water. What is the height?

Answer 1

5 feet

Explanation:

So you know the cross-sectional area of the circle at the bottom of the cylinder is 28 square feet and you are told the volume of the cylinder is 140 cubic feet which means the height must be 5 feet as the 28 square feet must continue going up to fill the 140 cubic feet.