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Question

If the flow of water in the tank stops, what will be the depth of water in the tank. Assume that the level of oil outside the tank does not increase.


A

30 cm

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B

10 cm

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C

2 cm

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D

None of these

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Solution

The correct option is D

None of these


So for the water to stop flowing, Pressure from both sides should be the same.


P1=P0+ρog(h1+h2)=P0+ρ0g(15)
P2=P0+ρogh1+gh2ρw
isgivenh1=5cm
ForP1=P2
P0+ρog(15)=P0+ρog(5)+gh2ρw
ρ0(10)=ρwh2
h2=ρ0ρw(10)=0.8×10=8cm


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