Define density and give the $MKS$ and $CGS$ units of density.

(N/A) Density is defined as the mass per unit volume of a substance. It is a measure of how much matter is packed into a given space.
Mathematically,$\text{Density} (\rho) = \frac{\text{Mass} (M)}{\text{Volume} (V)}$.
The $MKS$ $(SI)$ unit of density is $\text{kg/m}^3$.
The $CGS$ unit of density is $\text{g/cm}^3$.