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CGP EDU Academic Team
Published on: September 12, 2026
Two soap bubbles of radii $r_{1}$ and $r_{2}$ equal to 4 cm and 5 cm are touching each other over a common surface $S_1 S_2$ (shown in figure). Its radius will be
Text Solution
Verified by ExpertsThe correct answer is:
B
$r = \frac{r_1 r_2}{r_1 - r_2} = \frac{5 \times 4}{5 - 4} = 20 \text{ cm}$
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