Radius of an air bubble at the bottom of the lake is r and it becomes – McqOptions

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1.	Radius of an air bubble at the bottom of the lake is r and it becomes 2r when the air bubbles rises to the top surface of the lake. If P cm of water be the atmospheric pressure, then the depth of the lake is [Kerla PET 2005]
A.	2p
B.	8p
C.	4p
D.	7p
Answer» E.

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