[" 41.The work done in increasing the size of a soap film from "10cm times6],[cm" to "10cm times11cm" is "3times10^(-4)" joule.The surface tension of the "],[" film is: "],[[" (a) "1.5times10^(-2)N/m," (b) "3.0times10^(-2)N/m],[" (c) "6.0times10^(-2)N/m," (d) "11.0times10^(-2)N/m]]