Log1989 problem №3.48

The nozzle of the fountain, which gives a vertical jet of height H, has the form of a truncated cone that narrows upward. The diameter of the lower section D, the upper d, the height of the nozzle h. Determine the second water flow rate V, supplied by the fountain, and the overpressure ΔP in the lower section. Resistance of air in the jet and resistance in the nozzle is neglected.