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Question

At what velocity does water emerge from an orifice in a tank in which gauge pressure is

3×105Nm2 before the flow starts? (Take the density of water= 1000 kg m3.)

A
24.5ms1
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B
14.5ms1
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C
34.5ms1
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D
44.5ms1
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Solution

The correct option is B 24.5ms1
Here,P=3×105Nm2,
ρ=1000kgm3,
g=9.8ms2
As P=hρg

h=Pρg=3×1051000×9.8m

Velocity of efflux,

v=2gh=2×9.8×3×1051000×9.8

=600=24.495ms1=24.5ms1

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