Answer:
 160 ft³
Explanation:
You want the volume of a rectangular pyramid with a base that is 6 ft by 10 ft and a height of 8 ft.
The volume of the pyramid will be 1/3 the volume of a rectangular prism with the same length, width, and height:
 V = 1/3(LWH)
 V = 1/3(10 ft)(6 ft)(8 ft) = 160 ft³
The volume of the pyramid is 160 cubic feet.