Correct Answer - Option 3 : n = e/(1 + e)
Concept:
Void ratio (e):
Void ratio is usually defined as the ratio of the volume of voids to the total volume of soil solid.
Porosity (n):
Porosity is defined as the ratio of the volume of voids to the total volume of the soil.
The relationship between void ratio and porosity are as follows:
\(\rm{e=\frac{n}{1-n}\; and\; n=\frac{e}{1+e}}\)