The radius of a soap bubble increased from 1/(sqrt(pi)) cm to 2/(sqrt(pi)) cm. If the surface tesionof water is 30 dyne/cm, then the work done will be

The radius of a soap bubble increased from 1/(sqrt(pi)) cm to 2/(sqrt(

1.	The radius of a soap bubble increased from 1/(sqrt(pi)) cm to 2/(sqrt(pi)) cm. If the surface tesionof water is 30 dyne/cm, then the work done will be
Answer» 180 erg 360 erg 720 erg 960 erg Answer :C