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Q.

Water is poured in a tank through a cylindrical tube of area of  cross-section A and ejecting water at a constant speed 4 m/s. The tank contains a hole of area A/2 at bottom. Level of water in the tank will not go up beyond:
(take g = 10 m/s2)

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a

5.6 m

b

1.8 m

c

4.8 m

d

3.2 m

answer is C.

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Detailed Solution

For maximum level of water in tank
            A1u1=A2u2 A×4=A2×2gh  ⇒h=642g=3.2 m

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