The figure represents a U-tube of uniform crosssection filled with two immiscible liquids. One is water with density $ρ_{w}$ and the other liquid is of density $ρ$ . The liquid interface lies 2 cm above the base. The relation between $ρ$ and $ρ_{w}$ is

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​ P 0 ​ + ρ w ​ ​ g h 1 ​ − ρ w ​ g × 2 = P 0 ​ + ρ × g ( h 1 ​ − 2 ) ​ ⇒ ρ = ρ w ​ ​

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