Answer:
[tex]100\text{ ft}^3[/tex]
Step-by-step explanation:
We have been given that a rectangular prism has a top face with an area of 20 ft² and a height of 5 ft.
We know that volume of rectangular prism will be area of base or top face times height of the prism.
[tex]\text{Volume of rectangular prism}=20\text{ ft}^2\times 5\text{ ft}[/tex]
[tex]\text{Volume of rectangular prism}=100\text{ ft}^3[/tex]
Therefore, the volume of the rectangular prism would be 100 cubic feet.