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the mks unit is kg/m cube and the cgs unit is g/cm cube
We know that density=mass/volume so the density of the cube= 16 g (the mass)/64 cubic cm= 0.25 g/cubic cm
Volume of cube = 4 x 4 x 4 = 64 cubic cm Mass = 512 g Density = Mass/Volume = 512/64 = 8 g/cubic cm
Density = g / Cm Assuming g is in a unit of mass, and Cm is in a unit of volume, If these are not the units of the quantities given then the result will not be density, instead it will be gibberish! The units of the quantities going into an equation are more important than the values.
density = mass / volume → mass = density × volume → mass = 1.4 g/cm³ × 64 cm³ = 89.6 g