A polystyrene cube with mass $5.0\,\text{kg}$ is set on a horizontal surface. The pressure exerted by the cube is $89\,\text{N m}^{-2}$. What is the length of one side of the cube?
- A$0.56\,\text{m}$
- B$0.75\,\text{m}$
- C$1.3\,\text{m}$
- D$1.8\,\text{m}$