Task: Question Answering
Input (English): Problem: two trains start simultaneously from opposite ends of a 160 - km route and travel toward each other on parallel tracks . train x , traveling at a constant rate , completes the 160 - km trip in 5 hours . train y , travelling at a constant rate , completes the 160 - km trip in 3 hours . how many kilometers had train x traveled when it met train y ? 
Options: a ) 56 , b ) 58 , c ) 60 , d ) 62 , e ) 64
Output (English): c