Water at 20°C is to be pumped through 600m of pipe from reservoir 1 to 2 at rate of 0.1m³/s, as shown in the figure below. If the pipe is cast iron of diameter 15 cm and the pump is 75 percent efficient, what input power for the pump is needed (in kW)? 36 m Pump Problem 2 L = 600 m 2