#2: D1 or D2 Water Distribution Math Practice

In studying for my State Exam I taught myself, with a little guidance from the book, how to solve these types of problems in what seems to be a different type of way than the other common schools of thought that I have found out there on the inter webs, or even my work place. I, of course, find it most user friendly. Case study of one . . . Me! Haha. Let me know what you think! Thank you, Rolland Pacheco III