At 10:00 a.m., Train A left the station, and an hour later Train B left the same station on a parallel track. If Train A traveled at a constant speed of 60 miles per hour and Train B at 80 miles per hour, then at what time did train B pass train A?

First, consider what the question is really asking. If the question is “at what time did Train B pass Train A.” The means the answer can be found by understanding when Train B passes Train A, which is when they have traveled the same distance. Then use the information given - the train speed and when they left the station - to calculate the distance, or: speed = distance/time. To find distance, rearrange the equation: distance = speed(time)

Asked by Tom Tennant · Last updated 5 years ago · 1K views · SOURCE