Multiple choice

What is the speed of the train, which overtakes a man walking in the same direction at a speed of 5 kmph in 30 seconds, if the train is 274 km long?

  1. 51.88 kmph

  2. 27.88 kmph

  3. 37.88 kmph

  4. 21.67 kmph

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Relative speed = (274 km) / (30 seconds) = (274/1000 km) / (30/3600 hr) = 32.88 km/h. Train speed = relative speed + man's speed = 32.88 + 5 = 37.88 km/h. Option C is correct.