Q. Two cyclists are moving towards each other at 10 miles/hour. They are now 50 miles apart. At this instance a fly starts from one cyclist and move towards other and moves to and fro till the two cyclist meet each other. If the fly is moving at 15 miles/hour, what is the total distance covered by the fly?

• time taken by cyclists to meet = 50/20 2.5 hrs
  
  distance covered by fly during 2.5 hrs = 15*2.5 = 37.5 miles
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• The fly will also cover distance of 50 miles.
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