Volume of water in a 5' by 5' by 3' tall tank?

To find the volume of water in a tank, you can use the formula for the volume of a rectangular prism: Volume = length × width × height. For a tank that is 5 feet long, 5 feet wide, and 3 feet tall, the volume would be 5 × 5 × 3 = 75 cubic feet. Thus, the tank holds 75 cubic feet of water.