One cubic meter of a saturated soil sample has a total mass of 2400 kg. The solids have a specific gravity of 2.70. The dry density of the soil is most nearly:

6480kg/m³

Explanation:

Specific gravity is expressed as;

S = density of substance being measured/Density of the reference sample

Reference sample is the saturated soil

Density of the saturated soil = Mass/Volume

Density of the saturated soil = 2400/1

Density of the saturated soil = 2400kg/m³

Given

Specific gravity = 2.70

Get the dry density of the soil

Dry density of the soil = Specific gravity * Density of the saturated soil

Dry density of the soil = 2.70 * 2400

Dry density of the soil = 6480kg/m³

Hence the dry density of the soil is most nearly 6480kg/m³