Find Prism Volume by Packing Practice Test

A right rectangular prism is built from unit cubes in layers. One layer has 9 cubes across and 2 cubes deep, and the prism is 3 cubes tall (3 layers). The cubes pack the prism with no gaps or overlaps, so counting cubes is the same as multiplying the three whole-number dimensions. What is the volume of the prism?

A right rectangular prism is shown as stacked layers of unit cubes. The top view of one layer shows 4 cubes by 4 cubes (so 16 cubes in one layer). The prism has 2 layers stacked with no gaps or overlaps. Since packing equals multiplying the dimensions, what is the volume of the prism?