A train 240 m long is running at a speed of 88 km/h. In what time will it pass a man who is running at a speed of 16 km/h in the same direction?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 12 seconds.
Relative speed = train speed − man speed
Time = distance ÷ speed
Relative speed = 88 − 16 = 72 km/h = 72 × (5/18) m/s = 20 m/s
Distance = 240 m
⇒ Time = 240 ÷ 20
⇒ Time = 12 s