Two trains 115 meters and 95 meters long, run at the speeds of 50 kmph and 76 kmph respectively, in opposite directions on parallel tracks. The time which they take to cross each other, is-

Question: Two trains 115 meters and 95 meters long, run at the speeds of 50 kmph and 76 kmph respectively, in opposite directions on parallel tracks. The time which they take to cross each other, is-

Solution:
Length of the 1st train = 115 m
Length of the 2nd train = 95 m
Relative speed of the trains = (50 + 76) = 126 kmph
= (126 × 5)/18 m/sec
= 35 m/sec

Time taken to cross each other = (Length of 1st train + length of 2nd train)/relative speed of the trains
= (115 + 95)/35 sec
= 210/35 sec
= 6 sec