Kenneth S. answered • 03/16/16

Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018

If you inspect the Volume formulas for Prism & Pyramid, you will see that the latter formula has a factor of 1/3--the rest of the formulas is the same (namely Base Area • height). Consequently a pyramid having the same base as a prism will have only one third of the volume of the prism, if the two have identical heights.

A similar remark pertains to Cylinder & Cone.