A simply supported reinforced concrete beam carries a uniformly distributed load of 2 kN/m on a span of 4 m. The beam has a rectangular cross section 250 mm wide by 150 mm deep, with three 20 mm diameter steel bars placed 60 mm from the bottom of the beam, as shown below. The moduli of elasticity for the concrete and steel are 5 GPa and 200 GPa, respectively. Determine the average tensile stress in the steel and he maximum compressive stress in the concrete at the section of maximum bending moment. 450 mm 250 mm 60 mm

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