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A bubble of a liquid of surface tension S is blown to a radius r.

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A bubble of a liquid of surface tension S is blown to a radius r. The work done in blowing bubble is W. The percentage change in work done in doubling the radius of the bubble is

(1) 100%

(2) 200%

(3) 300%

(4) 400%

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(3) 300%

W = work done in blowing bubble of radius r

W' = work done in blowing a bubble of radius 2r

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