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An air bubble is released from the bottom of a lake of depth 11m.The temperature at the bottom is 4C and that at the surface is 12C.What is the ratio of bubble's radius at the surface and its radius at bottom?Assume density of heater is 100Kg/m3.Atmospheric pressure =75cm of Hg & density of mercury =13600Kg/m3

(A)1.2(B)1.3(C)1.4(D)1.5

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