A cylinder with radius r and height h is closed on the top and bottom. Which of the following expressions represents the total surface area of this cylinder?

The volume of a cylinder of radius r is 1/4 of the volume of a rectangular box with a square base of side length x. If the cylinder and the box have equal heights, what is r in terms of x?

The height h of a cylinder equals the circu,ference of the cylinder. In terms of h, what is the volume of the cylinder?

The height of sand in a cylindrical-shaped can drops 3 inches when 1 cubic foot of sand is poured out. What is the diameter, in inches, of the cylinder?

If the diameter of the base of a closed right circular cylinder be equal to its height h, then its whole surface area is