20. A soil at a constant moisture content shows the following when compacted Degree of Saturation 40% 70% Dry unit Weight 14.50 kN/m³ 17.89 kN/m³ a) Determine the specific gravity of soil b) Determine the moisture content of soil c) Determine void ratio of the 17.89 kN/m³ soil. 21. An undisturbed sample of fine sand is tested in the laboratory and is found to have a dry weight of 35.67 N, a total volume of 0.00198 m³ and a sp. gr. of 2.70. Other laboratory test were performed to determine the maximum and minimum density for the sand. At the maximum density, it has a void ratio of 0.35, at the minimum density, the void ratio is 0.95. a) Determine the volume of voids. b) Determine the void ratio. c) Determine the relative density of the undisturbed sample.