Question:
A jogger running at 9 kmph alongside a railway track in 240 metres ahead of the engine of a 120 metres long train running at 45 kmph in the same direction. In how much time will the train pass the jogger?
[A].3.6 sec
18 sec
36 sec
72 sec
A jogger running at 9 kmph alongside a railway track in 240 metres ahead of the engine of a 120 metres long train running at 45 kmph in the same direction. In how much time will the train pass the jogger?
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
Speed of train relative to jogger = (45 – 9) km/hr = 36 km/hr.
| = | 36 x | 5 | m/sec | |
| 18 |
= 10 m/sec.
Distance to be covered = (240 + 120) m = 360 m.
| Time taken = | 360 | sec | = 36 sec. | |
| 10 |