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Water falls from a height 60m at the rate of $15 k g s^{- 1}$ to operate a turbine. The losses due to frictional force are 10% of energy. If the power generated by the turbine is $n \times 0.1 k W$ , then find the value of n.

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Detailed Solution

$P = 15 \times 10 \times 60 = 9000$ watts
Loss of energy = 10%
90% of energy is used to generate power.
$∴ P = 9000 \times 0.9$ = 8100

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