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11. Two communicating vessels contain mercury. The diameter of one vessel is n times larger than the diameter of the other. A column of water of height h is poured into the left vessel. The mercury level will rise in the right-hand vessel   (s = relative density of mercury and  ρ= density of water) by

(a)  (n2h)/[(n+1)2s]                                         (b) h/[(n+1)2s]

(c)  h/[(n2 +1)s]                                               (d) h/(n2 s)

Answer-b

(35)

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