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The radius of a soap bubble is r. the su...

The radius of a soap bubble is r. the surface tension of soap solution is T, keeping temperature constant, the radius of the soap bubble is doubled the energy necessary for this will be-

A

24`pir^(2)`S

B

8`pir^(2)`S

C

16`pir^(2)`S

D

12`pir^(2)`S

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