Multiple choice

Two trains, each of length $125metre$, are running in parallel tracks in opposite directions. One trains is running at a speed $65km/hour$ and they cross each other in $6$ seconds. The speed of the other train is:

  1. $75km/hour$
  2. $85km/hour$
  3. $95km/hour$
  4. $105km/hour$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The trains cover a combined length of 250 m in 6 seconds, so their relative speed is 250/6 m/s = 150 km/h. Since they move in opposite directions, the second speed is 150 - 65 = 85 km/h.

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