SOLUTION: Train A is going 60mph. Train B is going 70mph. If train A passes the station at 5:15 and train B passes the station at 5:45, what time will train B catch train A?

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Question 336546: Train A is going 60mph. Train B is going 70mph. If train A passes the station at 5:15 and train B passes the station at 5:45, what time will train B catch train A?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Rate*Time=Distance
.
.
.
During that 1%2F2 hour difference, Train A travel 30 miles from the station.
Start counting time when Train B passes the station.
Train A's distance from the station is
Da=60t%2B30
Train B's distance from the station is,
Db=70t
Find t when Da=Db.
60t%2B30=70t
10t=30
t=3
It will take Train B three hours to catch up to Train A.