Problem on train

Two trains are traveling at 18kmph and are 60 km apart. There is flying in the train. It flies at 80kmph. It flies and hits the second train and then it starts to oscillate between the two trains. At one instance when the two trains collide it dies. At what distance travel by the fly.
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priyanka

  • Nov 21st, 2014
 

distance between two trains = 60 km
speed = 18km/h
traveling towards each other
so speed = 36 km/h
time to collide = 60/36= 5/3 hours.
speed of fly = 80 km/h
time it shuttles = 5/3 hours
distance = speed * time = 80*5/3
133.33 kms

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