Consider the following data for the performance of a centrifugal pump: Speed = 1200 rpm, flow rate = 30 L/s, head = 20 m and power = 5 kW. If the speed is increased to 1500 rpm, the power will be...

Consider the following data for the performance of a centrifugal pump: Speed = 1200 rpm, flow rate = 30 L/s, head = 20 m and power = 5 kW. If the speed is increased to 1500 rpm, the power will be nearly equal to

(a) 6.5 kW

(b) 8.7 kW