A copper cube of mass 0.50kg is weighed ...

A copper cube of mass `0.50kg` is weighed in water. The mass comes out to be `0.40 kg.` Is the cube hollower solid ? Given density of copper `=8.96 xx 10^(3)"kgm"^(-3)` and density of water `=10^(3) "kgm"^(-3).`

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