A pyramid-shaped building is 63 ft tall with a square base that is 81 ft on each side. What is the volume of the building in cubic feet? In cubic yards?

V = lwh/3

V = (81x81x63) / 3 = 137,781 cubic feet

There are 27 cubic feet in 1 cubic yard. So you need to divide the above answer by 27 to get cubic yards.

V = 137,781 cubic feet / 27 cubic feet = 5,103 cubic yards