If the pressure drop in a 100-m section of horizontal 10-cm-diameter galvanized iron pipe is 200 kPa, estimate the ?ow rate if the liquid ?owing is (a) water at 20-C, (b) SAE-10 oil at 80-C, (c) glycerin at 70-C, and (d) SAE-30 oil at 20-C. Because the Moody diagram requires a trial-and-error solution, one of the alternate equations is recommended.