That ridiculously hard math problem involving two trains.
Question: If Train A is heading towards the unabridged version at 30 MPH, and Train B is heading towards the unabridged version at 45 MPH, where will they collide? Answer: HERE
http://tvtropes.org/pmwiki/pmwiki.php/Laconic/TrainProblem
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That ridiculously hard math problem involving two trains.