If work done in increasing the size of soap film from 10 "cm " xx 6 "cmto " 10"cm " xx 11 "cm is" 2 xx 10^(-4) J, then the surface tension is

If work done in increasing the size of soap film from 10 "cm " xx 6 "c

1.	If work done in increasing the size of soap film from 10 "cm " xx 6 "cmto " 10"cm " xx 11 "cm is" 2 xx 10^(-4) J, then the surface tension is
Answer» `2 XX 10^(-2) "NM"^(-1)` `2 xx 10^(-4) "Nm"^(-1)` `2 xx 10^(-6)"Nm"^(-1)` `2 xx 10^(-9) "Nm"^(-1)` ANSWER :A