A 750-kW motor drives a pump with an efficiency of 70% and the pump operates with an efficiency of 80%. Determine the flow rate of the pump if it must overcome an energy head of 75 ft. If the pump in...

A 750-kW motor drives a pump with an efficiency of 70% and the pump operates with an efficiency of 80%. Determine the flow rate of the pump if it must overcome an energy head of 75 ft.

If the pump in Problem 9.6 must overcome an energy head of only 50 ft, what would be the efficiency for the same flow rate? What if the required head was increased to 85 ft?