The diagram represents a column of liquid. At the bottom of the liquid, the pressure produced by the liquid is $6000\,\text{N m}^{-2}$. Determine the density of the liquid.
- A$310\,\text{kg m}^{-3}$
- B$1200\,\text{kg m}^{-3}$
- C$29\,000\,\text{kg m}^{-3}$
- D$120\,000\,\text{kg m}^{-3}$