Multiple choice

A train of length 100 metres is moving at a speed of 72 km/h. A man is walking in the same direction at a speed of 6 km/h. How much time will the train take to completely pass the man?

  1. 6.45 seconds

  2. 5.45 seconds

  3. 3.25 seconds

  4. 7.35 seconds

  5. 4.25 seconds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Relative speed = 72 - 6 = 66 km/hr. Convert to m/s: 66 * (5/18) = 55/3 m/s. Time = Distance / Speed = 100 / (55/3) = 300 / 55 = 5.45 seconds.

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