SOLUTION: Two trains are traveling in 60 kmph on same trace, towards each other. When the distance between them is 18 km, a fly is going to start, flying between them in 80 kmph speed. Find

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Question 387537: Two trains are traveling in 60 kmph on same trace, towards each other. When the distance between them is 18 km, a fly is going to start, flying between them in 80 kmph speed. Find the traveling path distance of the fly up to when it is going to crush by the 2 trains?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
You can think of the situation as 1 of the trains being
stationary and the other moving towards it at the sum of their
speeds, or 60+%2B+60+=+120 km/hr
The fly leaps off the stationary one at 80 km/hr. Now
think of the fly as being stationary, and the other train
coming towards it at the sum of their speeds,
or 120+%2B+80+=+200 km/hr. At that speed, the fly and the train
will meet in 18%2F200+=+.09 hr or 5.4 min
But the trains will meet in 18%2F120+=+.15 hr or 9 min
So, the fly gets to travel for .15+-+.09+=+.06 hr at 120
km/hr and 120%2A.06+=+8.2 km
I get 18+%2B+8.2+=+26.2 km as the distance the fly travels
I am unsure of this. I may only be half right. Check another source.