The suction and discharge pipes of a pump are connected to a differential mercury manometer. The diameter of the suction pipe is 200 mm and the diameter of the discharge pipe is 150 mm. The 30°
specific gravity of the pumped liquid is S = 0.81, and the manometer reading is H = 600 mm. Determine the pressure head rise across the pump if the discharge is Q = 115 L/s. The centerlines of the suction and discharge pipes are at the same elevation.