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A man of mass 60kg lifts a 15kg mass to the top of a building of height 10m in 5 minutes. His efficiency is
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Correct option is B
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Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. It losses 10% of energy due to frictional forces . How much power is generated by the turbine?
(g = 10 )
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