A centrifugal water pump with a .1 m diameter inlet and a .1 m diameter discharge pipe has a flow rate of .002 m^3/s. The inlet pressure is .2 m Hg vacuum and the exit pressure is 240 kPa. The inlet and outlet sections are located at the same elevation. The measured input is 6.75kW. Determine the pump efficiency. Pump efficiency is defined as the ratio of the power output from the shaft to the power input. Assume there is no loss due to shear (Wshear = 0, except Wshaft), and there is no Wother either.