A tank of density-stratified salt solution, having a depth H = 0.3 m is prepared in the laboratory. The density of the liquid increases linearly with depth starting from the value of pure water ( ) at the uper surface and increasing to a value 1.4 time the density of pure water at the bottom of the tank. A rectangular wood block of height h = 0.3 m and density = 0.7 times the density of pure water is placed in the tank. Calculate the depth below the surface of the liquid to which the bottom surface of the block sinks when it is floating in equilibrium