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 16 kmph and 21 kmph respectively . when they meet , it is found that one train has travelled 60 km more than the other one . the distance between the two stations is ? 
Options: a ) 222 km , b ) 333 km , c ) 555 km , d ) 444 km , e ) 666 km
Output (English): d