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## Main Question or Discussion Point

At the present moment, I am reading a section in my physics textbook concerning relative velocity. In an example the author provides, he states that two trains are travelling in opposite directions at a speed of 80 km/h; and relative two each other they are travelling at a speed of 160 km/h. Somehow, I cannot see why this is true, perhaps I have an underdeveloped physical intuition. Could someone help me with this concept?

Thank you

Thank you