Differentiation rules thx ,related rates

19. Water is leaking out of an inverted conical tank at a rate 0f "' 10,000 cm3/ min at the same time that water is being pumped into the tank at a constant rate. The tank has height 6 In and the diameter at the top is 4- m. If the water level is rising at a rate of 20 cm/ min when the height of the water is 2 m, nd the rate at which water is being pumped into the tank