i) If 1,000 gallons per minute (gpm) of water are flowing tthrough the 4-inch (inside diameter) pipe, find average velocity of water in pipe ?
ii) If flow passes into the section of two inches pipe, find average velocity in smaller pipe?
iii) The common rule of thumb for trying to keep pumping cost low is to design for average fluid velocity of about 3ft/sec. Find pipe diameter needed to get the average velocity with the volumetric flow rate of 1,000 gpm?