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Knowing that the reinforced concrete beam cross section effective depth is d = 310 mm and...

Knowing that the reinforced concrete beam cross section effective depth is d = 310 mm and the properties of materials used are f'c = 28 MPa and fy = 420MPa and the external ultimate bending moment Mu = 254 KN.m with strain in tension steel reinforcement equal to 0.005 . The width of the beam is Select one : a . 511 b . 385 c . 460 mm d . 640
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