A motor (η = 90 %) drives a pump (η = 80 %) delivering 50 L/s through a 200 m, 150 mm pipe, f = 0.0051 (ρ = 998 kg/m^{3}). Determine the motor input. Take f as Bansal’s coefficient, h_{f} = 4fLV^{2}/(2gd); there is no static lift. (answer in kW)