In the accompanying diagram, a right circular cone is carved out of a solid foam cylinder and discarded. What is the volume of the foam remaining in the cylinder?
volume of original cylinder - volume of cone = volume remaining
pi r^2 h - 1/3 pi r^2 h = volume remaining
r and h are the same for both of the figures
pi r^2 h ( 1 - 1/3)
pi 52 6 (2/3) = .......... units3