If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight w per unit volume, the minimum depth (h)

[Srinivasan]

If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of
weight w per unit volume, the minimum depth (h) of the foundation from the free surface of the
earth, is

(A) h = (W/Aw) [(1 - )/(1 + sin )]

(B) h = (W/Aw) [(1 + )/(1 + sin )]

(C) h = (W/Aw) [(1 - )/(1 + sin )]²

(D) h W/Aw) [(1 - )/(1 + sin )]²

The correct Answer Is
(C) h = (W/Aw) [(1 - )/(1 + sin )]²