Two trains are traveling at 18kmph and are 60 km apart. There is a fly in the train. It flies at 80 kmph.
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. Distance traveled by the fly when both trains collide?
Distance between two trains = 60 km
Relative Speed = 18+18 =36 km/hr
Time to collide = 60/36
= 5/3 hours
So the fly will oscillates between the two trains for 5/3 hours at 80 km/hr.
Distance traveled by fly = 5/3 * 80
= 133.33 km
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