Question: two pressure gauges measure a pressure drop of 163 psi...
Two pressure gauges measure a pressure drop of 16.3 psi (lb/in^2) at the entrance and exit of an old buried pipeline. The original drawings have been lost. If the 6in galvanized iron pipe carries water at 68°F with a flow rate of 1.64cfs (ft^3/s), determine the length of the horizontal underground line ignoring minor losses.
NOTE: The answer is 871ft. Please show how to solve for this.