The limestone blocks from which an ancient pyramid was made weigh about 2 tons per cubic yard. Find the approximate weight of the pyramid having a square base of length 250 yards and a height of 150 yards.

Answer 1

vol(pyramid) = (1/3)area of base x height
= (1/3)(250)^2(150)
= 3125000 cubic yards.

each cubic yards weighs 2 tons
so the pyramid would weigh about 6250000 tons