A jogger running at 9 kmph alongside a railway track is 240 metres ahead of the engine of a 120 metr......

A jogger running at 9 kmph alongside a railway track is 240 metres ahead of the engine of a 120 metre long train running at 45 kmph in the same direction. In how much time will the train pass the jogger ?

Speed of train relative to jogger = (45-9) = 36 kmph
= 36*(5/18) = 10 m/sec

Distance to cover = 240 + 120 = 360 metres

Time = Distance/Speed

360/10 = 36s

Hence, option 4 is the correct answer.

By: Amit Kumar