A cube of iron of edge `5 cm` floats on the surface of mercury, contained in
Channel: Doubtnut
Date: 26/07/2020

A cube of iron of edge `5 cm` floats on the surface of mercury, contained in a tank. Water is then poured on top, so that the cube just gets immersed. Find the depth of water layer. (Specific gravities of iron-and mercury are `7.8` and `13.6`, respectively.)