Question

the mass of a 30cm cube stone is 180g .​

Answer 1

v= 30³= 30×30×30= 27000 cm³

m= 180 g= 0,18 kg

density is m/v= 0,18/27000= 6,(6) kg/m3

Answer 2

What should I do by this question? I think the question is incomplete.

Although,

Volume = 30 cm^3

Mass = 180 g

So,  Density = mass/volume

                    = 180/30

                    = 6 g/cm^3