When a large bubble rises from the bottom of a lake to the surface. Its radius doubles. If atmospheric pressure is equal to that of column of water height H, then the depth of lake is
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a
H
b
2H
c
7H
d
8H
answer is C.
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Detailed Solution
P1V1=P2V2⇒P0+hρg×43πr3=P0×43π(2r)3Where, h = depth of lake⇒hρg=7P0⇒h=7×Hρgρg=7H