2-62 The water in a large lake is to be used to generate electricity by the installation of a hydraulic turbinegenerator at a location where the depth of the water is 50 m. Water is to be supplied at a rate of 5000 kg/s. If the electric power generated is measured to be 1862 kW and the generator efficiency is 95 percent, determine (a) the overall efficiency of the turbine-generator, (b) the mechanical efficiency of the turbine, and (c) the shaft power supplied by the turbine to the generator. (Answers: 0.76, 0.80, 1964 kW)