# Block, water and a bit of oil?

An oil have a density of $$930\text{ kg/m}^3$$ floats on water. A rectangular block of wood $$4\text{ cm}$$ high and with a density $$960\text{ kg/m}^3$$ 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? (in meters)

×