A piston in a gas supply pump has an area of $500\,\text{cm}^2$ and it travels a distance of $30\,\text{cm}$. The pump pushes the gas against a constant pressure of $4000\,\text{Pa}$. How much work is done by the piston?
- A$60\,\text{J}$
- B$6.0 \times 10^3\,\text{J}$
- C$6.0 \times 10^5\,\text{J}$
- D$6.0 \times 10^7\,\text{J}$