Final answer:
The density of the solid material in a completely saturated soil with a total density of 2045 kg/m3 and a water content of 25% is calculated by subtracting the mass of water from the total density, resulting in 1533.75 kg/m3.
Step-by-step explanation:
To calculate the density of the solid in a soil that is completely saturated, you would first need to address the given values: The soil's total density is 2045 kg/m3, and its water content is 25%. Since the water content is part of the soil's total density, we can find the mass of water by multiplying 25% times the total density:
Mass of water = 0.25 x 2045 kg/m3 = 511.25 kg/m3
Now, we must subtract this mass of water from the total density to find the density of the soil solids:
Density of solids = Total density - Density of water
Density of solids = 2045 kg/m3 - 511.25 kg/m3 = 1533.75 kg/m3
Therefore, the density of the solid material in the soil is 1533.75 kg/m3.