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A soap buble of radius 1.0 cm is formed ...

A soap buble of radius 1.0 cm is formed inside another soap bubble of radius 2.0 cm . The radius of an another soap bubble which has the same pressure difference as that between the inside of the smaller and outside of large soap bubble , in metres is

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The correct Answer is:
2
`P_("inside") ` smaller bubble
`=P_("atm") +(4T)/(R_("out"))+(4T)/(R_("in"))`
`P_("inside")` equivalent bubble
`=P_("atm") +(4T)/(R_(eq))`
`implies1/(R_(eq))=1/(R_"out")+1/R_("in")`
`implies R_("eq")=2 cm`
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