Two soap bubbles of radii r(1) and r(2) ...

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

4 cm

20 cm

5 cm

4.5 cm

Text Solution

Verified by Experts

The correct Answer is:

`r=(r_(1)r_(2))/(r_(1)-r_(2))=(5xx4)/(5-4)=20 cm`

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