Acentrifugal pump delivers 227 m^3 /hr of water from a source 4 meters below the pump centre line to a pressure tank whose pressure is 2.8 kg/cm2 . friction loss estimates are 2 meters in the suction line and 1 metre in the discharge line. the diameter of the suction pipe is 250 mm and the discharge pipe is 200 mm. find: a) the water horsepower b) the kw rating of the driving motor if the pump efficiency is 70%