math
posted by linda .
how do I find the volume of a pyramid with a square base, 20 meters on each side, and a height of 21 meters

V = 1/3 * base area * height
V = (1/3)(400)(21)
V = 2,800 cubic meters 

Volume of a pyramid is
1/3 times area of base times ht
base is 20(20)= 400 height=21
V= 1/3(400)(21)cubic units