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Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy . How much power is generated by the turbine ? $( g = 10\: m/s^2)$

$\begin {array} {1 1} (1)\;7.0kW & \quad (2)\;8.1kW \\ (3)\;10.2kW & \quad (4)\;12.3kW \end {array}$

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