(Solved): When installed at sea level, a 12-inch-diameter centrifugal water pump impeller delivers 1400 gall ...

When installed at sea level, a 12-inch-diameter centrifugal water pump impeller delivers 1400 gallons per minute through the discharge line. What is the pump output power (i.e. the power delivered by the pump motor to the shaft) at this operating point? \( 16 \mathrm{hp} \) \( 18 \mathrm{hp} \) \( 20 \mathrm{hp} \) \( 22 \mathrm{hp} \)