All formulas for walking in the opposite direction at the same time and different places, walking back to the same place at the same time, and walking in the same direction at the same time and different places (different speeds) Follow up questions:

(Walking in the opposite direction): the sum of catching distance/catching speed = catching time.

(Driving in the same direction): catch-up distance/catch-up speed difference = catch-up time.

Go in the opposite direction:

Distance = speed * time

Speed = distance/time

Time = distance/speed

Run counter to:

Opposite distance = speed and * time

Example:

Party A and Party B walk back to each other from point A, with Party A walking 12km/h and Party B walking15 km/h..

After two hours, how many kilometers are they apart?

(12+ 15) * 2 = 54 (km)

Speed and * time = distance

A: They are 54 kilometers apart.