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A fluid is flowing through a horizontal ...

A fluid is flowing through a horizontal pipe of verying cross - section, with speed `v ms^(-1)` at a point where the pressure is P Pascal .
At another point where pressure is `P/2`
Pascal its speed is `V ms^(-1)`. If the density of the fluid is `rho " kg "m^(-3)` and the flow is stremline, then V is equal to :

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