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When an air bubble of radius 'r' rises f...

When an air bubble of radius `'r'` rises from the bottom to the surface of a lake, its radius becomes `5r//4` (the pressure of the atmosphere is equal to the `10 m` height of water column). If the temperature is constant and the surface tension is neglected, the depth of the lake is

A

10.5 m

B

8.7 m

C

11.2 m

D

9.5 m

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