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Air is expanded from 50 litre to 150 li...

Air is expanded from 50 litre to 150 litre at 2 atmospheric pressure (1 atm pressure -`10^5 kgm^(2)` ). The external work done is

A

200 J

B

2000 J

C

`2 xx10^(4)J`

D

`2 xx10^(-12)J`

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