Multiple choice

The lengths of the trains going in opposite directions having speeds 100 km./hr and 104 km./hr is 250 m and 260 m. They will cross each other after how many seconds ?

  1. 12 seconds

  2. 14 seconds

  3. 16 seconds

  4. 9 seconds

  5. 20 seconds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total distance to cover = 250 + 260 = 510 m. Relative speed (opposite direction) = 100 + 104 = 204 km/hr = 204 × (5/18) = 56.67 m/s. Time = distance/speed = 510/56.67 ≈ 9 seconds.

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