If a concrete column 200 x 200 mm in cross-section is reinforced with four steel bars of 1200 mm^{2} total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm^{2} and E_{s} is 15 E_{c}

If normal stresses due to longitudinal and transverse loads on a bar are σ_{1} and σ_{2} respectively, the normal component of the stress on an inclined plane θ° to the longitudinal load, is

If M, I, R, E, F, and Y are the bending moment, moment of inertia, radius of curvature, modulus of elasticity stress and the depth of the neutral axis at section, then