A water irrigation tank is shaped like a cube and has a side length of 2 1/2 feet. How many cubic feet of water are needed to completely fill the tank?

If you would like to know how many cubic feet of water are needed to completely fill the tank, you can calculate this using the following steps:

a = 2 1/2 feet * 2 1/2 feet * 2 1/2 feet = 2 1/2 * 2 1/2 * 2 1/2 = 5/2 * 5/2 * 5/2 = 125/8 = 15 5/8 cubic feet

The correct result would be 15 5/8 cubic feet.