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 )/(1 + sin )]_________________?

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

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

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

D. h = (W/Aw) [(1

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