The work done in increasing the size of ...

The work done in increasing the size of a rectangular soap film with dimensions 8 cm x 3.75 cm to 10 cm x 6 cm is `2 xx 10^(-4) J`. The surface tension of the film in `(N m^(-1))` is

`1.65xx10^(-2)`

`3.3xx10^(-2)`

`6.6xx10^(2)`

`8.25xx10^(-2)`

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The correct Answer is:

`W=TxxDeltaA`

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