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A sealed balloon, filled with air, float...

A sealed balloon, filled with air, floats in water with `(1)/(3)` of its volume submerged. It was found that if it is pushed inside water at a depth h, it remains in equilibrium, neither sinking nor rising. Find h. Given that height of water barometer is 10m and temperature is constant at all depth.

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The correct Answer is:
20m
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