About This Cheat Sheet

Complete guide to Pipes and Cistern for competitive exams: basic concepts of inlet pipes (fills the tank) and outlet pipes (empties the tank), work done by pipes in one hour (1/time to fill or empty), finding time taken to fill tank when multiple pipes work together, time to fill when pipes open for different durations, pipes opened at different times, alternate pipes opening (one pipe opens after another), pipes with different efficiencies, finding capacity of tank from given conditions, partially filled tank problems, pipes that fill and empty simultaneously (net work = inlet rate – outlet rate), finding time when one pipe fills and another empties, problems on leak detection (leak empties tank), time to fill with leak, and shortcut tricks for SSC, Banking, Railway, UPSC, and other government exams.