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Air is pushed into a soap bubble of radi...

Air is pushed into a soap bubble of radius r to double its radius, of the surface tension of the soap solution is S, the work done in process is

A

`8 pi r^(2)S`

B

`12 pi r^(2)S`

C

`16 pi r^(2)S`

D

`24 pi r^(2)S`

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The correct Answer is:
D
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