The area of the cross-section of a road fully in banking shown in the given figure, is________________?
(A) [sb² + r² (2bd + sd)²]/(r² – s²)
(B) [sb² + r² (2bd + sd)²]/(r² – s5)
(C) [sb² + r² (2bd + sd)²]/(r – s)
(D) None of these
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