A rectangular prism is truncated removing 10% of its height. The original height of the prism was 100 meters and it has a length of 4 meters and a width of 20 meters. What is the volume of the truncated prism?

Question

A rectangular prism is truncated removing 10% of its height.  The original height of the prism was 100 meters and it has a length of 4 meters and a width of 20 meters.  What is the volume of the truncated prism?

directrix · Answer

The truncated height is 90% of 100 meters = 90 meters.
The volume of a right rectangular prism is the following:
V = Bh where B is the area of the base (a rectangle with dimensions 4 by 20)
V = (4*20) * 90
V = 7200 cubic meters