A rectangular wooden block of height 20cm and uniform cross-sectional area 50cm2 floats upright in fresh water (ρ=1000kgm−3). Exactly 15cm of its height is below the water surface.
(i) Calculate the density of the wood.
(ii) The same block is now floated in kerosene of density 800kgm−3. Determine the depth of the block that will be submerged in the kerosene.