Q.
An open U-tube of uniform cross -section contains mercury. When 27.2 cm of water is poured into one limb of the tube, then the difference in levels of liquids of the two sides is (ρwater=1 gm/cm3 and ρHg=13.6 gm/cm3 )
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a
23.2 cm
b
25.2 cm
c
21.2 cm
d
None
answer is B.
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Detailed Solution
27.2×1×g=h×13.6×g h=2 cm ∴ difference =27.2–2 =25.2 cm
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