Water is leaking out of a cylindrical tank , with circular base radius 0.8 m at the rate of 0.2 m3/min. The water level is falling at ...? ..m/min. What is the question mark? (Hint: the radius does not change) V=(pi)r^2h, dV/dt = 0.2, r = 0.8 ? Can anyone give me a hand in getting this one started?