Sewage at a certain pumping station is raised vertically by 5.13 m at the rate of 1 860 000 liters each day. The sewage, of density 1 050 kg/m3, enters and leaves the pump at atmospheric pressure and through pipes of equal diameter.
(a) Find the output mechanical power of the lift station.
W
(b) Assume an electric motor continuously operating with average power 3.85 kW runs the pump. Find its efficiency.
%