Two soap bubbles of radii r 1 and r 2 equal to 4cm and 5cm are touching each other over a…

Physics · JEE Main · NTA Exams — Properties of Solids and Liquids

Two soap bubbles of radii r₁ and r₂ equal to 4cm and 5cm are touching each other over a common surface S₁S₂ (shown in figure). Its radius will be :

1. 4 cm
2. 20 cm
3. 5 cm
4. 4.5 cm

Answer

(B) 20 cm

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