Acertain process requires 13 cfs of water to be delivered at a pressure of 30 psi. this water comes from a large-diametersupply main in which the pressure remains at 60 psi. if the galvanized iron pipe connecting the two locations is 200 ft longand contains six threaded 90= elbows, determine the pipe diameter. elevation differences are negligible. a certain process requires 13 cfs of water to be delivered at a pressure of 30 psi. this water comes from a large-diametersupply main in which the pressure remains at 60 psi. if the galvanized iron pipe connecting the two locations is 200 ft longand contains six threaded 90= elbows, determine the pipe diameter. elevation differences are negligible.