The volume of the cylinder = base area * height
The base area = pi r^2

The dimension of the volume must be cubic units
The tank can hold between 110 and 115 cubic feet of water

If r = 3 and h = 4 and pi = 3.14

The tank dimensions are r = 3 feet and h = 4 feet
You can choose r = 2 and h = 9
V = 113.04
You can choose r = 6 and h = 1
V = 113.04