The pressures just upstream and downstream of a hydraulic turbine are measured to be 95 psia and

Question:

The pressures just upstream and downstream of a hydraulic turbine are measured to be 95 psia and 15 psia, respectively, and the water flow through the turbine is 280 lbm/s. The turbine accepts water at the bottom level of a large water reservoir. If the efficiency of the turbine is estimated to be 86 percent, determine
(a) The shaft power output from the turbine
(b) The height of this reservoir?