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A 15 cm length of steel rod with relative density of 7.4 is submerged in a two layer fluid. The bottom layer is mercury and the top layer is water. The height of a top surface of the rod above the liquid interface in ‘cm’ is
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- 8.24
- 7.82
- 7.64
- 7.38
Correct Option: D
Consider buoyance of floating bodies
Sb hb = Sw x + Sm (15 – x)
⇒ 7.4 × 15 = 1.x + 13.6 (15 – x)
∴ x = 7.38 cm
