Two trains having lengths 550 m and 650 m are running parallel to each other in opposite directions at speeds of 68 km/h and 40 km/h, respectively. In how much time (in seconds) they will cross each other?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 40.
Total length of both trains = (550 + 650) = 1200
Relative Speed = (68 + 40) = 108 km/hr [Train moving in the opposite direction]
Converting in m/sec
108 × 5/18 = 30 m/sec
Time taken = Distance/Speed
Time taken = 1200/30 = 40 sec