Two materials (wrought iron, ks = 0.046 mm, and galvanized iron, ks = 0.15 mm) are being considered for a new pipeline. The expected discharge is 0.15 m3/s. Both the head loss and cost are sought for. Wrought iron pipe costs 5 cents more than the galvanized iron pipe for very meter length of the pipe. Determine the tradeoff between the cost and the energy head per meter length for pipe diameters of 200 mm and 150 mm. (v = 1.141 x 10-6 m2/s)