Calculation: Let the length of each train be L. When a train crosses a pole completely, it traverses a distance equal to its own length. According to the question Velocity of first train =
L
5
Velocity of second train =
L
6
Whenever a train crosses another train, Each train travels a distance equal to the sum of their lengths at relative speed. ⇒ Distance to be traveled =L+L=2L Since they are travelling in the same direction, we have ⇒ Relative speed =