A litre of dry air at $STP$ expands adiabatically to a volume of $3$ litres. If $\gamma=1.40,$ the work done by air is$(3^{1.4}=4.6555)$ [Take air to be an ideal gas $]$

  • [JEE MAIN 2020]
  • A

    $90.5 \;J$

  • B

    $48 \;J$

  • C

    $60.7 \;J$

  • D

    $100.8 \;J$

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