Water from the bottom of a dam of depth ...

Water from the bottom of a dam of depth `h` comes out through a narrow pipe and strikes continuousy the tips of the blades of a water turbine. The length of each blade is R. Calculate the most advantaneous speed of rotation of the turbine
[Hint : The most advantageous speed corresponds to the development of maximum power in the turbine]

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The correct Answer is:

`sqrt(2gh)//3R`

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