Question 1093875
<br>Each hour, the passenger train goes 12 miles farther than the freight train.<br>
 If it catches up to the freight train in 2 hours, then it went 24 miles farther than the freight train; in other words, the freight train was 24 miles from the station when the passenger train started.<br>
If the freight train, traveling at 48mph, was 24 miles from the station when the passenger train started, then it must have started 1/2 hour before the passenger train.