We are given a figure and we are asked to determine its volume. The given figure is a straight prism, therefore, the volume is given by:

Where:

Substituting the values we get:
![V=(20\operatorname{cm})(5\operatorname{cm})]()
Solving the operation:
![V=100\operatorname{cm}^3]()
Therefore, the volume of figure A is 100 cubic centimeters. The same procedure can be used to determine the volume of figure B.