A rectangular film of liquid is extended from (4cmxx2cm) to (5cmxx4cm). If the work done is 3xx10^(-4)J, the value of the surface tension of the liquid is

A rectangular film of liquid is extended from (4cmxx2cm) to (5cmxx4cm)

1.	A rectangular film of liquid is extended from (4cmxx2cm) to (5cmxx4cm). If the work done is 3xx10^(-4)J, the value of the surface tension of the liquid is
Answer» `0.025Nm^(-1)` `0.125Nm^(-1)` `0.02Nm^(-1)` `8.0Nm^(-1)` ANSWER :B