If d is the thickness of a concrete pavement, the equivalent radius b of resisting section for an
interior loading, is
(A) b = d
2
) - 0.675 d
(B) b = d
2
) + 0.675 d
(C) b = d
2
) - 3.675 d
(D) b = d
2
) - 0.675 d
interior loading, is
(A) b = d
2
) - 0.675 d
(B) b = d
2
) + 0.675 d
(C) b = d
2
) - 3.675 d
(D) b = d
2
) - 0.675 d