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A closed box of thin aluminium foil of ...

A closed box of thin aluminium foil of volume 10 cc and mass 3 gm is completely filled with a liquid . It is now put into water and when it floats . It is just completely immersed . Find the density of the liquid filled inside the box ( density of water `10^(3) kg//m^(3)`)

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`0.7 xx10^(3) kg//m^(3)`
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