Question 169005
Distance(d) equals Rate(r) times Time(t) or d=rt; r=d/t and t=d/r

When each train travels 50km, they will have crashed into each other

Time required for each train to travel 50 km=50/10=5 hr

So the bumblebee gets to fly back and forth for 5 hours before it gets smashed, so:
distance bumblebee travels=60*5=300 km


Hope this helps---ptaylor