A jogger running at 9 kmph along side a railway track is 280 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?
Select the correct option.
A) 3.6 sec B) 40 sec C) 36 sec D) 72 sec E) None of these
Speed of train relative to jogger   = (45 – 9) km/h = 36 km/h   = (36 × 5⁄18) m/sec = 10 m/sec   Distance to be covered = (280 + 120)= 
<gadget id="calculator">(280 + 120)</gadget>
<output>400</output>
400 m.   ∴ Time taken= (400⁄10) sec = 40 sec.   Answer 40 sec
<result>B</result>
A jogger running at 9 kmph along side a railway track is 280 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?