Train A and Train B are travelling away from each other at speeds if 50mph and 70mph respectively. What is the relative speed of two trains ?
I don’t know why you have added the speeds. Can you please explain this .
I’m confused when to add and subtract the speeds
If two objects move in same direction at different speeds
If speed of 1st object = x km/hr and
Speed of 2nd object = y km/hr
Therefore, their relative speed = (x – y) km/hr [x > y]
If two objects move in opposite direction at different speeds
If speed of 1st object = x km/hr and
Speed of 2nd object = y km/hr
Therefore, their relative speed = (x + y) km/hr
Thank you. @HoldMyBeer