If the density of ice is 0.9 g cm^-3, what portion of an iceberg will remain below the surface of water in a sea? (Density of sea water = 1.1 g cm^-3)

Density of ice = 0.9 g cm^-3

Density of sea water = 1.1 g cm^-3

By the principle of floatation,

∴ {Volume\ of\ immersed\ part\over Total\ volume} = {0.9\over 1.1}= {9\over 11}= 0.818

Hence, the volume of icebergs that will remain below the surface of water in the sea = {9\over 11} th of total volume (or 0.818th) part.