"A cube of wood whose edge is 12 mm is floating in a liquid in a glass with one of its faces parallel to the liquid surface. The density of wood is 682 kg/m3, that of liquid is 1296 kg/m3.A light oil is gently poured onto the immiscible liquid surface to form a 4 mm thick layer above the liquid. The density of the oil is 606 kg/m3. When the wood cube attains hydrostatic equilibrium again, what will be the distance from the top of the liquid to the bottom face of the cube?