Question 414277
distance between two trains = 60 km
speed = 18km/h
travelling 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