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The energy required to blow a bubble of radius 4 cm and 3 cm in the same liquid is in the ratio of

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3 : 4

4 : 3

64 : 27

16 : 9

answer is C.

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Detailed Solution

$W = T A = T \times 2 \times 4 π r^{2}$

$W ∝ r^{2}$

$\frac{W_{1}}{W_{2}} = {(\frac{4}{3})}^{2} = \frac{16}{9}$

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