Professor Giljum is working on a seemingly endless design project to rehabilitate a 54-in diameter reinforced concrete pressure sewer (i.e. force main). The pumping plant discharges to both this 54-in

force main and a parallel 60-in relief force main. Briefly explain how to estimate what percentage of a given flow rate will be conveyed by the 54-in pipe and what percentage will be conveyed by the 60-in pipe.