Task: Question Answering
Input (English): Problem: two passenger trains start at the same hour in the day from two different stations and move towards each other at the rate of 13 kmph and 21 kmph respectively . when they meet , it is found that one train has traveled 60 km more than the other one . the distance between the two stations is ? 
Options: a ) 11 , b ) 408 , c ) 2881 , d ) 287 , e ) 221
Output (English): b