Correct Answer - Option 3 : 200 kPa

**Concept:**

As per Terzaghi’s theory, The ultimate bearing capacity of **square footing **is given by,

Ultimate bearing capacity (qu) = 1.3× c× Nc + q × Nq + 0.4 × γ × B × N_{γ }....(1)

C - Cohesion of clay

Nc, Nq, N_{γ }- Bearing capacity factors, γ = unit weight of soil

q = overburden pressure = γ × D

D = depth of the footing, B = width of square footing

**Calculation:**

Given:

c = 27 kPa, Size of footing = 4 m × 4 m

For saturated clay ϕ = 0^{°}

For ϕ = 0^{°}, **N**_{c} = 5.7, N_{q} = 1, N_{γ} =0

∴ q_{u} = 1.3 × 27 × 5.7 + γ × D × 1

It is given that the footing rests on soil,** D = 0**

∴ qu = 1.3 × 27 × 5.7 = **200 kPa.**