Extracted text: A rectangular cross-section of a reinforced concrete beam is shown in the figure. The diameter of each reinforcing bar is 16 mm. The values of modulus of elasticity of concrete and steel are 2.0 x 104 MPa and 2.1 x 105 MPa, respectively. 200 mm Centroidal axis 35 mm The distance of the centroidal axis from the centerline of the reinforcement (x) for the uncracked section (in mm, round off to one decimal place) is 350mm