Specific gravity = density of a substance/density of water
or density of a body = specific gravity* density of water
= specific gravity*1 gm/cc ( in C.G.S system density of water = 1 gm/cc)
Here density of the body = 14.5 gm/cc ( remember specific gravity is a ratio so it has no unit; it is mere number)
when a body is immersed in water it displaces water equal to its volume( Archimedes principle)
Hence volume of the body = 4 ml
But Density = mass/ volume or mass = volume * density = 4 * 14.5 = 58 gm.
