In a reinforced concrete column, the cross –sectional area of steel bar is as and that of concrete ia AC; the equivalent area of the section n terms of concrete is equal to.
(a) As+mAc
(b) Ac+mAs
(c) As-mAc
(d) Ac-mAs
(a) As+mAc
(b) Ac+mAs
(c) As-mAc
(d) Ac-mAs