Water falls from a height of 60m at the rate of 15kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is generated by the turbine?(g=10m/s2)
A
12.3kW
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B
7.0kW
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C
8.1kW
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D
10.2kW
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Solution
The correct option is C8.1kW Mass of water falling/second =15kg/s h=60m,g=10m/s2,loss=10 % i.e.,90% is used. Power generated =15×10×60×0.9 =8100W=8.1kW. Hence, the correct answer is option (c).