Subject: mathqa
Question: two passenger trains start at the same hour in the day from two different stations and move towards each other at the rate of 25 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 ?
Option: 
A: 453 km
B: 645 km
C: 444 km
D: 552 km
Answer: D