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 Options: A . &nbsph = (W/Aw) [(1 - sin φ)/(1 + sin φ)] B . &nbsph = (W/Aw) [(1 + sin φ)/(1 + sin φ)] C . &nbsph = (W/Aw) [(1 - sin φ)/(1 + sin φ)]² D . &nbsph = √(W/Aw) [(1 - sin φ)/(1 + sin φ)]²

If A is the area of the foundation of a retaining wall carrying a load W and ret

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