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Surface tension of a sopa solution is `1.9xx10^(-2) N//m`. Work done in blowing a bubble of 2.0 cm diameter will be

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Surface tension of a sopa solution is `1.9xx10^(-2) N//m`. Work done in blowing a bubble of 2.0 cm diameter will be
A. `7.6xx10^(-6) pi` joule
B. `15.2 xx10^(-6) pi` joule
C. `1.9xx10^(-6) pi` joule
D. `1xx10^(4) ` joule
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Correct Answer - B
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