An open water tank has an orifice 10 cm ...

An open water tank has an orifice 10 cm below the surface of water. If there is no loss of energy, then what is the speed of efflux ? (Take g = 10 m `s^(-2)`)

1.414 m `s^(-1)`

2.5 m `s^(-1)`

6.32 m `s^(-1)`

3.7 m `s^(-1)`

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