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In a hydel power project, 2000kg of water passes through the turbine every second. Water is falling from a height of 240m above ground. If the power output is 3.6 MW, the efficiency of the power house is (g= 10ms-2)

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a
60%
b
75%
c
80%
d
90%

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detailed solution

Correct option is B

P=mght=2000×10×2401=4.8 MW
efficiency =3.64.8×100=75%

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