+4622 \(ABCDEFGH\)shown below is a right rectangular prism. If the volume of pyramid \(ABCH\) is 20, then what is the volume of \(ABCDEFGH\)?
+9481 
The volume of a pyramid = (1/3) * area of base * height, even when the height is not located above the center of the base....see https://www.mathopenref.com/pyramidvolume.html
(1/3) * ABC * HD = 20 un3 so ABC * HD = 60 un3
volume of prism = ABCD * HD
ABCD = 2 * ABC
volume of prism = 2 * ABC * HD
volume of prism = 2 * 60 un3
volume of prism = 120 un3 
