Multiple choice

A 165 m. long train is moving at the speed of 58 km./hr. A man is coming from opposite direction of the train at the speed of 8 km./hr. In what time will the train cross the man ?

  1. 10 seconds

  2. 8 seconds

  3. 12 seconds

  4. 6 seconds

  5. 9 second
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

When a train and a person move in opposite directions, their relative speed is the sum of their individual speeds. Here, relative speed = 58 km/hr + 8 km/hr = 66 km/hr = 66 × (5/18) m/s = 55/3 m/s. Time to cross the person = distance/speed = 165 ÷ (55/3) = 165 × 3/55 = 9 seconds.

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