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posted by k.k .
the relative density is 6.5. find the mass of the solid cube of side 2ocm

Density=m/v R.d.=6.5. ; 6500kg/m^3.,
Volume of cube= 20*20*20/ (100)^3.. Therefore.. M=6500*20*20*20/ (100)^3 = 52kg
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