A timber column 8m long and is laterally supported at a point 2.5m from the bottom carries an axial load of 400kN. If the allowable compressive stress parallel to the grain is 18Mpa and modulus of elasticity of wood is 18000Mpa. Assume that the bracing is on the smaller width of the column Compute the maximum limit of slenderness ratio which would indicate its limit between a long column and an intermediate column 1. Choose the smallest safe size of column on the following list O 200x250 200x275 225x275 250x250 O 275x275 300x300 O 350x400