In a simply supported beam of span 'l', each end is restrained against torsion, compression flange being unrestrained. According to IS : 800, the effective length of the compression flange will be equal to
Consider the following statements regarding uniform flow in an open channel : 1. Energy grade line, water surface and bed slope are parallel to each other. 2. Froude number does not vary from section to section. 3. Velocity of water is the same at all points of the cross-section. Of these statements :