Q: Why do we add speeds of trains/buses moving in opposite directions to compute their relative speed in the context of calculating their meeting point? I just want to understand the logic behind adding or subtracting individual speeds in questions with similar context.
For example: P & Q are 300 km apart. At 8:00 am, buses X and Y left P & Q simultaneously for Q & P respectively. If the speeds of buses X and Y are 40 kmph and 60 kmph respectively, when do they meet?
