a buried horizontal concrete pipe (n=0.012) of unknown length needs to be replaces. the length is not known because the original plans for the pipeline route have been lost. the pressure head drop along the segment that needs to be replaced is 29.9 ft.
If the flow rate is 30.0 cfs what length of new pipe is needed?
How much would the answer change (in percent) if the n value was difficult to determine and could be assignes a value of 0.013 instead of 0.012?
Assume minor loses are negligible and verify your results with computer software