In case the $8m$ on top and bottom are parallel, you have a trapezium prism, with trapezium area $(10m+5m)/2 imes 2m$ and 'height' $8m$ (perpendicular to the trapezium), resulting in a volume of $120 m^3$. Furthermore the question might be ambiguous whether the $8m$ edge of the top face is parallel or perpendicular to the $8m$ edge of the bottom face, and this affects the final result. The pyramid-based answers do not work because the trapezoidal prism is not actually part of a pyramid: the non-horizontal edges do not meet in a single point. Identify the parallel sides of the base (trapezoid) to be $b_ I am confused what is the correct approach. I saw online different methods giving different answers to this question. I also assume a prism is the same thing as a pyramid for geometrical purposes.ДЄ trapezoidal prism is a 3D figure made up of two trapezoids that is joined by four rectangles.

I only confusion I have about this problem is the calculation of the volume of the stack which I believe is the trapezoidal prism (or truncated (right) rectangular prism or frustum of (right) rectangular prism). I know the approach needed to solve this problem. By how many centimetres can the level be raised?

For a plot of land of 100 m Г— 80 m, the level is to be raised by spreading the earth from a stack of a rectangular base 10 m Г— 8 m with vertical section being a trapezium of height 2 m.

Volume of a trapezoidal prism