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A goods train of length 500 m transverse a 2-km-long tunnel at a constant speed of 36 km/hour. The time needed for the train to completely pass through the tunnel is

  1. 3 minutes 20 seconds

  2. 4 minutes 10 seconds

  3. 4 minutes 40 seconds

  4. 6 minutes 10 seconds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total distance to cover = 2000 m + 500 m = 2500 m = 2.5 km. Speed = 36 km/hr = 10 m/s. Time = distance / speed = 2500 / 10 = 250 seconds. 250 seconds = 4 minutes and 10 seconds.

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