Task (3) Electric power is to be generated by installing a hydraulic turbine-generator at a site 70 m below the free surface of a large water reservoir that can supply water steadily at a rate of 850 kg/s. If the mechanical power output of the turbine is 520 kW and the electric power generation is 460 kW, determine: a) the turbine efficiency and b) the combined turbine-generator efficiency of this plant Neglect losses in the pipes. 850 kg/s T 77 m

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