In a doubly reinforced beam if c and t are stresses in concrete and tension reinforcement, d is the effective depth and n is depth of critical neutral axis, the following relationship holds good

In a doubly reinforced beam if c and t are stresses in concrete and tension reinforcement, d is the effective depth and n is depth of critical neutral axis, the following relationship holds good

a) mc/t = n/ (d-n)    (Ans)

b) (m+c)/t = n(d+n)

c) (t+c)/m = (d+n)/n

d) mc/t = (d-n)/t