It takes 6 cubic inches of colored sand to fill a plastic cone. How many cubic inches will it take to fill a plastic cylinder with the same base and height as the cone?

A. 18

B. 24

C. 2

D. 12

The volume of a cone is equal to

Volume = pi * r^2 * h / 3

The volume of a cylinder is equal to

Volume = pi * r^2 * h

The cone is filled with 6 cubic inches colored sand.

As you observed, the volume of the cone is 1 / 3 of the volume of the cylinder.

Cone = Cylinder / 3

6 = Cylinder / 3

Cylinder = 18

So the answer is A. 18.