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Speed of Efflux

A cylinder of...

Question

A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in m/s) through a small hole on the side wall of the cylinder near its bottom is

A

10

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B

20

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C

25.5

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D

5

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Solution

The correct option is B 20
$v = \sqrt{2 g h} = \sqrt{2 \times 10 \times 20} = 20 m / s$

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