The pressure difference between points 1 and 2 in the series pipe system in Figure P4.5.3...

The pressure difference between points 1 and 2 in the series pipe system in Figure P4.5.3 is 15 psi. All the pipes are galvanized iron with roughness value of 0.0005 ft. The loss coefficient at the sudden contraction is 0.05. Determine the flow rate in the system. The prevailing temperature is 70°F.

Figure P4.5.3