Extracted text: The total compressive force at the time of failure of a concrete beam section of width 'b' without considering the partial safety factor of the material is (a) 0.36 fok b Xu (c) 0.66 fok b Xu (b) 0.54 f b Xu (d) 0.8 f b X, ck where X, is the depth of neutral axis, f cube strength of concrete. ck