Boat and Stream-03:Concept, Technique and Solution:Shortcut Tricks:By Am...

Resultant speed is the only thing which makes the chapter "Boat and Stream” different from "Time and distance" and "Train". "Boat and Stream” is in the continuation of Time and Distance and Train, so we should always take all these three chapters as a whole. Watch the video: "Boat and Stream-03: Concept, Technique and Solution” : https://youtu.be/qPJeStj8Lmg