A 20-HP pump is employed to deliver water from a stream to an open air holding tank located 1500 ft away where the water level is to be maintained at an elevation 75 ft above the stream level (Figure...

A 20-HP pump is employed to deliver water from a stream to an open air holding tank located 1500 ft away where the water level is to be maintained at an elevation 75 ft above the stream level (Figure PS.26). The pipe line is cast iron and the water temperature is 60°F. If the required flow rate is 1000 gpm, what is the minimum diameter of the pipe to meet these requirements?