Two trains, 120 metres and 180 metres long, run in opposite directions at 40 m/s and 20 m/s respectively. How many seconds do they take to completely cross each other?

Question

Accepted Answer

5. Combined length = 300 m and relative speed = 40 + 20 = 60 m/s; time = 300 / 60 = 5 seconds.

Two trains, 120 metres and 180 metres long, run in opposite directions at 40 m/s and 20 m/s respectively. How many seconds do they take to completely cross each other?

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