Question 37170
The formula for the volume of a pyramid is

V = 1/3 Bh   where B is the area of the base.  Thus

V = 1/3(62)(180)(100) = 372000 cubic yards (if the pyramid is solid)

Now the density (D = M/V) is given as 432 lbs/cu yd so the weight (mass) is

W = VD = 372000 x 432 = 160,704,000 pounds