What will be the work done in increasing the radius of the soap bubble from2rto2r , if the surface tension of soap solution is T?

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What will be the work done in increasing the radius of the soa

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What will be the work done in increasing the radius of the soap bubble from $\frac{r}{2} to 2 r$ , if the surface tension of soap solution is T?

3 π r^{2} T

30 π r^{2} T

9 π r^{2} T

12 π r^{2} T

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What will be the work done in increasing the radius of the soap bubble from $\frac{r}{2} to 2 r$ , if the surface tension of soap solution is T?