Cooling water for a chemical plant must be pumped from a river 2,500 ft from the plant site. Preliminary design calls for a flow of 600 gal/min and 6-in. steel pipe. Calculate the pressure drop and the annual pumping cost if power costs 3 cents per kilowatt hour. Would the use of an 8-in. pipe reduce the power cost enough to offset the increased pipe cost? Use $15/ft of length for the installed cost of 6-in. pipe and $20/ft for 8-in. pipe. Annual charges are 20 percent of the installed cost.