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The work done in increasing the size of ...

The work done in increasing the size of soap film from `10cm xx 6cm` to `10cm xx 11cm` is `3 xx 10^-4` joule. The surface tension of the film is,

A

`1.5 xx 10^-2 N/m`

B

`3.0 xx 10^-2 N/m`

C

`6.0 xx 10^-2 N/m`

D

`11.0 xx 10^-2 N/m`

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The correct Answer is:
B
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