The excavation was being done for a foundation trench in a plastic clay having a unit weight of 2.3 gm/cc. When the depth of excavation reached 4 meters, it failed. On the Assumption that ϕ = 0, the value of the cohesion of the clay is?
1
2.3 kg/cm2
2
0.23 kg/cm2
3
23 kg/cm2
4
230 kg/cm2