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Q.

A cylinder of height $80 m$ 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 it’s bottom is

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a

$60 m / s$

b

$40 m / s$

c

$20 m / s$

d

$80 m / s$

answer is B.

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Detailed Solution

$v = \sqrt{2 g h} = \sqrt{2 \times 10 \times 80} = \sqrt{1600} = 40 m / s$

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