math
posted by john .
Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?
I know this is a distant rate a time question but cannot seem to write out the correct formula and arrive at a correct answer.

I posted this a while back and really need some guidance on this answer ...from a teacher.

I have already answered this question, including the feedback question, and am a teacher. It is easiest to solve in steps, using logic, rather than by trying to write down an equation.

See http://www.jiskha.com/display.cgi?id=1263078373
for my other answer.
Did you post it under two different names?