The current vertical effective stress acting on soil is 100 kN/ m^2. The past maximum vertical effective stress was 200 kN/m^2. The overconsolidation ratio is: a. 0.25
b. 4.5
c. 1

This question is incomplete, the complete question is;

The current vertical effective stress acting on soil is 100 kN/m².

The past maximum vertical effective stress was 200 kN/m².

The over consolidation ratio is:

a. 0.25

b. 4.5

c. 1

d. 2

the over consolidation ratio is Option d. 2

Explanation:

Given that;

The past maximum vertical effective stress = 200 kN/m²

The current/present vertical effective stress acting on soil = 100 kN/m²

The over consolidation ratio

OCR = Past effective stress / Current Effective stress

we substitute

OCR =  200 kN/m² / 100 kN/m²

OCR = 2

Therefore the over consolidation ratio is Option d. 2

do you have any options?