Water with a density = 1000 kg/m3 , and viscosity = 1.0 x 10-3 kg/ms is to be pumped from the bottom of a well that is 630 m below the surface to an open storage tank on the surface in a 20cm interior diameter smooth steel pipe at a linear velocity of 1.61 m/s. The mass flow is 50.51 kg/s. The friction loss in the pipe and fittings is 286.5 J/kg. Atmospheric pressure at the surface is 9.2 x 105 Pa. The pressure at the bottom of the well is 5.2 x 105 Pa. What is the pump work if the pump efficiency is 73%