A chest is filled with toy blocks. Each block has a volume of 1 cubic foot. Twenty-five blocks fit in the bottom of the chest and the height of the chest is 3 feet. What is the volume of the chest?

The correct answer is 75 cubic feet.

Step-by-step explanation:

Volume of each block of cube is 1 cubic foot. Since the block is of the shape of a cube, the side length is 1 foot.

Number of blocks needed to fill the bottom of the the chest is 25.

Height of the chest is 3 feet.

Therefore there are three layers to be filled by blocks. Each layer needs 25 blocks each. Thus number of blocks needed to fill the whole chest is 25 * 3 = 75.

Volume of 75 blocks = Volume of the chest = 75 * 1 = 75 cubic feet.

Therefor the volume of the chest is given by 75 cubic feet.