Question 169954
    Two trains 100 km apart each travel towards each other at 10 km per hour. A bumblebee starts flying back and forth between the two trains at 60 km per hour, until the two trains crash into each other. How far does the bumblebee travel? 
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You will need to apply the "distance formula":
d = rt
where
d is distance
r is rate or speed
t is time
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Let t = time before trains crash
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10t + 10t =  100
20t = 100
t = 5 hours
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Since the bee is traveling 60 km/hr we multiply this with 5 hours to determine distance traveled:
60*5 = 300 km