Word problem, need help setting it up.?

Question

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 80 miles per hour and train B is traveling at 90 miles per hour. Train A passes a station at 4:15pm. If train B passes the same station at 4:27 pm. At what time will train B catch up to train A?

Answer 1

4:15 and 4:27 - that 12 minutes apart.

12 minutes is 1/5 of an hour (12/60 = 1/5 = 0.20).

Trains A has 1/5 of an hour head start.  At 80 miles per hour (times 1/5) is 16 miles (80 * 0.2 = 16 miles).

Train b has to make up 16 miles.  The difference is speed is 10 mph (90 - 80 = 10).

16 / 10 = 1.6 hours

1.6 hours =  1 hour and 36 minutes.

So it take 1.6 hours

So 4:27 plus 1:36 ==>> 6:03 pm

Good Luck...

P.S Next time do your own home work...

Answer 2

Need to know where they both started from, and when, otherwise the question is about as much value as, 'how long is a piece of string?'