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What is the correct answer?

4

In a built up beam actual bending compressive stress fbc is given by (when y1 is the distance of the edge of the beam from the neutral axis).

A. fbc = (M/Ixx) × y₁

B. fbc = (Ixx/M) × y₁

C. fbc = (Ixx/M) + y₁

D. fbc = (M/Ixx) + y₁

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