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Q.

A hole is made at the bottom of a tank filled with water. If the total pressure (absolute pressure) at the bottom is 3 atmosphere, then velocity of efflux is

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a

105 ms-1

b

102 ms-1

c

20 ms-1

d

106 ms-1

answer is A.

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Detailed Solution

v = 2gh   and pressure due to liquid is 2 atmosphere.

According to Bernoulli's theorem

3P0+0=P0+12ρv2

v=4P0ρ = 2×2×105103ms-1 = 20 ms-1

 

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