*P*Hg (density of Mercury) = 13.6 g/cm3 (1 in= 2.54 cm)

Since the second condition is in the same closed container therefore,

*P*Hg(hHg)=

*P*alc(halc)

where:

*P*Hg = Density of mercury

*P*alc= Density of alcohol

hHg= height of mercury

halc= height alcohol

h=30

halc=

*P*Hg(hHg)/

*P*alc= 13.6

**1.33 x 104 mm**

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