Two liquids L1 and L2 are contained in a U – tube. The height and the density of L1 are 8 cm and 10³ kgm−³ respectively. If the density of L2 is 800 kgm−³, its height measured from the same level is

A. 8 cm
B. 10 cm
C. 16 cm
D. 12 cm

Correct Answer:

Option B = 10 cm

Explanation

Generally, from Hares Experiment, density is inversely proportional to height
i.e h ∝1/d; → h1d1 = h2d2
∴ 8 x 10³ = h2 x 800
∴ h2 = 8 x 10³/800

= 10cm