Final answer:
The statement given is false. The relative density of clean sand does not increase linearly from 60%.
Step-by-step explanation:
The statement given is false. The relative density of clean sand does not increase linearly from 60%. Relative density is the ratio of the density of a substance to the density of another substance, usually water. It is a dimensionless quantity, represented as a decimal or percentage. Since relative density compares the density of a substance to water, which has a density of 1000 kg/m³, a relative density of 60% means that the sand has a density of 0.6 * 1000 kg/m³, or 600 kg/m³. The density of the sand remains constant at 600 kg/m³, and does not increase linearly with the relative density.