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APPENDIX Q-3) A simply supported beam (L = 4.5 m) with rectangular cross section (b 95 mm, h 280 mm) supports uniform load q 25 kN/m. The ratio of the magnitudes of the principal stresses (a/a) at a point a 1.0 m from the left support and distance d 100 mm up from the bottom of the beam is approximately (A)9 (B) 17 (C) 31 (D) 41

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