A pump has a head of 50 m and flow 60 L/s; suction line 100 m × 100 mm; η_{o} = 70 %; f = 0.003. Find the power required. Take 50 m as the static lift and the 100 m × 100 mm pipe as the whole friction line; f is Bansal’s coefficient, h_{f} = 4fLV^{2}/(2gd). (answer in kW)