Q. In a doubly-reinforced beam if and is the effective depth and is depth of critical neutral axis, the following relationship holds good (Solved)
1. mc/t = n/(d - n)
2. (m + c)/t = n/(d + n)
3. (t + c)/n = (d + n)/n
4. mc/t = (d - n)/t
- a. mc/t = n/(d - n)