The friction factor applicable to turbulent flow in a smooth glass pipe is given by 0.079/Re/4. Calculate the pressure loss per unit length necessary to maintain a flow of 0.02 m s of kerosene, specific gravity 0.82, viscosity 1.9 x 10 N s m, in a glass pipe of 8 cm diameter. If the tube is replaced by a galvanized steel pipeline, wall roughness 0.15 mm, calculate the increase in pipe diameter to handle this flow with the same pressure gradient.