The pressure of 200 kg/s of water is to be increased from 1 atm to 4 MPa. The water enters through a 20-cm-diameter pipe and exits through a 12-cm-diameter pipe. Assume that the internal energy and specific volume of water do not change from the entrance to exit. The specific volume of water is equal to 0.001 m3/kg. Calculate the horsepower required to operate the pump.