$A$ gas absorbs a certain amount of heat and expands by $200 \ cm^3$ against a constant external pressure of $2 \times 10^5 \ Nm^{-2}$. What is the work done by the system (in $J$)?
- A$-400.3$
- B$-40.0$
- C$-3.947$
- D$-253.1$
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