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A U-tube having a horizontal arm of length 20 cm , has a uniform cross-sectional area 1 cm 2 . It is filled with water of volume 60 cc . The volume of a liquid of density 4 g cc - 1 required to be poured in one arm of the U-tube so that no water is left in the horizontal arm of the tube is (take g = 9 . 8 m s - 2 )

Options

  1. A60 cc
  2. B45   cc
  3. C50   cc
  4. D35   cc

Correct answer

D. 35   cc

Step-by-step solution

h ρ g = 6 0 × 1 × g h = 1 5 cm g = 980   cm sec - 2 Volume = 1 5 + 2 0 × 1 = 3 5 cc

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