## Relation Between Porosity(n) & Void Ratio(e)

By the definition of **porosity**, we have, n = Vv/V

Where, Vv = Volume of voids in a given soil mass.

V= Total volume of the soil mass = Volume of voids in the given soil mass(Vv) + Volume of soil solids in the given soil mass(Vs).

Thus, n = Vv / (Vv + Vs)

Or, n = 1 / (1 + Vs/Vv) [Both sides diveded by Vv]

Or, n = 1 / (1 + 1/e) [By the definition of **void ratio** e=Vv/Vs]

Or, n = e / (1 + e)

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