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Q.

In a vessel of water a hole is made at a depth of 3 .5 m from the free surface. The velocity of efflux will be:

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a

8.4 m / s

b

84 m / s

c

8.4 cm / s

d

84 cm / s

answer is A.

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Detailed Solution

u=2gh=2×9.8×3.5=8.3 m/s
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