Two trains are running in opposite direction with a speed of 62 Km/hour and 40 km/hour respectively.If the length of one train is 250 meters and they cross each other in 18 seconds then what is the length of the other train?

Guest Aug 21, 2020

#1**+1 **

Since the 2 trains are running towards each other, then their combined speed is:

62 + 40 = 102 km/h

Convert 102 km/h to meters per second =28 1/3 m/s

Since they passed each other in 18 seconds, then:

**28 1/3 m/s x 18 seconds =510 meters - The length of the 2nd (longer) train.**

Just to confirm the above, the 250 m train would have covered its length in:

250 / (28 1/3 m/s) =8.824 seconds. And 18 seconds - 8.824 seconds =9.176 seconds that would have taken the longer train to pass. So:9.176 seconds x 28 1/3 m/s =260 extra meters covered by the longer train.

**So, 260 m + 250 m = 510 meters - the length of the 2nd train.**

Guest Aug 21, 2020