$P-V$ diagram of an ideal gas is as shown in figure. Work done by the gas in process $ABCD$ is
$P-V$ diagram of an ideal gas is as shown in figure. Work done by the gas in process $ABCD$ is
- A
$4P_0V_0$
- B
$2P_0V_0$
- C
$3P_0V_0$
- D
$P_0V_0$
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