Water is flowing through a pipe having diameter 270 mm and 180 mm at the bottom and upper end respectively. The intensity of pressure at the bottom...

Water is flowing through a pipe having diameter 270 mm and 180 mm at the bottom and upper end respectively. The intensity of pressure at the bottom end is 23.75 N/cm2 and the pressure at the upper end is 9.81 N/cm2. Determine the difference in datum head if the rate of flow through pipe is 36 lit/s