Hi, I have a tricky question, and was hoping somebody could explain to me how I would go about solving it. Here it is: Oil having a density of 930 kg/m3 floats on water. A rectangular block of wood 4.00 cm high and with a density of 960 kg/m3 floats partly in the oil and partly in the water. The oil completely covers the block. How far below the interface between the two liquids is the bottom of the block? the answer is x = 1.71 cm Any help is much appreciated.