Posted by **linda** on Friday, January 7, 2011 at 5:03pm.

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

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**Ms. Sue**, Friday, January 7, 2011 at 5:09pm
V = 1/3 * base area * height

V = (1/3)(400)(21)

V = 2,800 cubic meters

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**Ms. Sue**, Friday, January 7, 2011 at 5:10pm
http://www.mathsisfun.com/geometry/square-pyramid.html

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**mathematical mom**, Friday, January 7, 2011 at 5:18pm
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

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