**
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?
**

##### 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 |