How many cubic inches of fluid are expelled from a piston with an area of 20 square inches moving 5 inches?

To determine how many cubic inches of fluid are expelled from the piston, you need to use the formula for the volume of a cylinder, which is the area of the base multiplied by the height the piston moves. In this case:

1. The area of the piston is given as 20 square inches.
2. The distance the piston moves (the height) is 5 inches.

To find the volume expelled, you can multiply the area of the piston by the distance it travels:

Volume = Area × Height
Volume = 20 square inches × 5 inches
Volume = 100 cubic inches

This calculation shows that the volume of fluid expelled from the piston is 100 cubic inches, making that the correct answer.