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

math  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

math  Ms. Sue, Friday, January 7, 2011 at 5:10pm
http://www.mathsisfun.com/geometry/squarepyramid.html

math  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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