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Q.

The liquids shown in figure in the arms are mercury (Specific gravity = 13.6) and water. If the different of heights of the mercury columns is 2 cm, then the height of the water column is

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a

30 cm

b

72 cm

c

27 cm

d

32 cm

answer is D.

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Detailed Solution

PA=PB

h1ρ1=h2ρ2

h1×1=2×13.6

h1=27.2 cm≈27 cm

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The liquids shown in figure in the arms are mercury (Specific gravity = 13.6) and water. If the different of heights of the mercury columns is 2 cm, then the height of the water column is