The $P-V$ diagram of a diatomic ideal gas system going under cyclic process as shown in figure. The work done during an adiabatic process $CD$ is (use $\gamma=1.4$) (in $J$)
  • A$-500$
  • B$-400$
  • C$400$
  • D$200$
JEE MAIN 2021, Medium
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