Homework Help: Algebra

Posted by Math on Friday, May 6, 2011 at 11:52pm.

Train A is traveling at 100 mph and train B is traveling at 104 mph. Train A passes a station at 12:15 p.m. If train B passes the same station at 12:45 p.m., at what time will train B catch up to train A? HELP please I am drawing a complete balank at figuring the how to solve this.

Algebra - drwls, Saturday, May 7, 2011 at 12:20am
The distance between the trains decreases at a rate ot 4 mph.

When train B passes the station, at 12:45, train A is 50 miles ahead. (100 mph x 1/2 hour)

The time required for train B to catch up is 50 miles/4 mph = 12.5 hours.

The time will then be 1:15 AM

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