A rectangular prism has a volume of 27in. If a rectangular pyramid has a base and height congruent to the prism, what is the volume of the pyramid?
Since the base and height of the pyramid are congruent to the prism, the volume of the pyramid will be one-third of the volume of the prism (since the volume of a pyramid is one-third of the volume of a prism with the same base and height).
Therefore, the volume of the pyramid is 27in / 3 = 9in.