Question 1206199
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You're cycling with your friends on a flat track. You're going 10 miles per hour, 
and your friend is a bit ahead, going 12 miles per hour. How long will it take you to catch up 
to your friend if the distance between you is 2 miles?
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If it is not a circular track,  then at given conditions you  (as the more slow cyclist) 
will  NEVER  catch up to your friend  (who is faster cyclist and is  2  miles ahead you now.)


It is so obvious that I will not spend my and your time for proofs or explanations.



If,  in opposite,  the track is assumed to be circular,  then its length must be given 
in the post in order for the problem be solvable.


But,  due to unknown reason,  this data  ABSENTS  in the post,  making the problem  FATALLY  DEFECTIVE.