A cement truck pours cement into a container in the shape of a cylinder with a radius of 4 feet. The heighth of the cement in the container increases at a rate of approximately 10 inches per minute. Write an equation that models the volume V of the
cement in the container in terms of h then use the equation to determine the time at which the volume is 80 cubic feet.
Note that the volume of a cylinder is Vrh where and h are the radius and height of the cylinder