To find the volume of the pyramid, we need to use the fact that the volume of a pyramid is one-third of the volume of a prism that has the same base and height.
Given that the volume of the prism is 600 ft³, we can calculate the volume of the pyramid as follows:
\[ \text{Volume of Pyramid} = \frac{1}{3} \times \text{Volume of Prism} \]
Substituting the volume of the prism into the equation:
\[ \text{Volume of Pyramid} = \frac{1}{3} \times 600 , \text{ft}^3 = 200 , \text{ft}^3 \]
Therefore, the volume of the pyramid is 200 ft.³.