AP Extra credit.

Due Wednesday AP 4 Thursday AP 3. An object is 1 m high it is submerged in a barrel that is filled with a water ( density = 1000 kg/m3) for the bottom half and oil (density = 700 kg/m3) for the top half. A cube ( density = 900 kg/m3) 1 m on a side is placed in the barre and floats partly in water and partly in oil. What is the height of the top of the cube below the oil water interface? Alternatively, what fraction of the cube is in the water?