A play yard has a sandbox in the shape of rectangular prism with a height of 1.5 ft and a base that is 5 ft wide by 6 ft long.

During the summer, the sandbox had to be emptied and refilled 3 times.

How many total cubic feet of sand were refilled in the summer?

About 135 cubic feet

Still confused? I'll explain why:

It's simple, the amount of cubic feet is the volume of the sandbox multiplied by three.

The formula for the volume of a rectangular prism is length x width x height.

So, if we plug in your values and multiply:

6 (length) x 5 (width) x 1.5 (height) = 45 cubic feet

and since the sandbox was refilled three times, we're gonna multiply it by 3

45 x 3 = 135 cubic feet

The cubic feet for one is 45 so if you times that by 3 you get 135 cubic feet

So in short lad, the answer is 135 cubic feet