Question

The total unit weight of the glacial outwash soil is 5 kN/m³. The water content in the soil is 17%. Find dry unit weight
1. 0.29 kN/m³
2. 6.27 kN/m³
3. 3.40 kN/m³
4. 4.27 kN/m³

Answer 1

Correct Answer - Option 4 : 4.27 kN/m³

Concept:

The formula for finding the dry unit weight of soil is given by:

\({γ _d} = \frac{γ }{{1 + w}}\)

where, 

γd = Dry unit weight of soil

γ = Total Unit weight of soil

w = Water content

Calculations:

Given Data:

\(γ\) = 5 kN/m3

w = 17 % = 0.17

So, 

\({γ _d} = \frac{5 }{{1 + 0.17}}=4.27\;kN/m^3\)