Discussion :: Problems on Trains

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?
Answer : Option C
Explanation :
Speed of train relative to jogger = (45  9) km/hr = 36 km/hr.
= \([36 *\frac { 5 } { 18 }]\)  m/sec  
= 10 m/sec.
Distance to be covered = (240 + 120) m = 360 m.
Time taken =  \([ \frac { 360 } { 10 }] \) sec  = 36 sec.  
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