A cubical block of wood having an edge 10 cm and mass 0.92 kg floats on a tank of water with oil of relative density 0.5 to a height of 4 cm above water. When the block attains equilibrium with four of its edges vertical
A. 1 cm of it will be above the free surface of oil
B. 5 cm of it will be under water
C. 1.6 cm of it will be above the comon surface of oil and water
D. 8.4 cm of it will be under water
