A clepsydra, or water clock, is a glass container with a small hole in the bottom through which water can flow. The clock is calibrated

A clepsydra, or water clock, is a glass container with a small hole in the bottom through which water can flow. The €œclock€ is calibrated for measuring time by placing markings on the container corresponding to water levels at equally spaced times. Let x = f(y) be continuous on the interval [0, b] and assume that the container is formed by rotating the graph of about the -axis. Let B denote the volume of water and the height of the water level at time t.
(a) Determine V as a function of h.
(b) Show that

-x= f(y)