A pipe line of two sections, the first of 50 mm dia. and 15 m length and the second of 75 mm dia and 24 m length connected in series empties a reservoir at the rate of 168 l/min. The entry is sharp...

A pipe line of two sections, the first of 50 mm dia. and 15 m length and the second of 75 mm dia and 24 m length connected in series empties a reservoir at the rate of 168 l/min. The entry is sharp edged. The enlargement is sudden. Discharge is to atmosphere. The values of friction factor are 0.0192 and 0.0232 for the pipes. Determine the difference in height between the reservoir level and the discharge point.