[Solved] 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

Q.	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
Answer» C. h = (W/Aw) [(1 - )/(1 + sin )]²

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