We have a vessel in shape of a cuboid partially filled with water. It base is square wilth an area of `4.5dm^(2) (1dm=10cm)` and a vessel contains water up to `2 cm` height. Then we place wooden cube inside water. The wood has mass `4kg` and specific gavity `0.5`. The base of the wooden cube is horizontal. Find the height of water level above the base of the wooden block.