Question

Barkley has a box shaped like a cylinder that he will use to package a ball for a gift. He wants to fill the remainder of the box with packing foam.
Which formulas will he need to use to find the volume of packing foam he will need?

Choose all answers that are correct. (In these formulas, r represents radius, h represents height, l represents length, and w represents width.)

Answer 1

The volume that is filled with foam is going to be the volume of the container minus the volume of the ball.
 
The container is a cylinder, so he will need the formula for its volume.
This is $V=\pi r^2h$.

The ball is a sphere, so he will need the formula for a sphere.
This is $V=\frac{4}3\pi r^3$.