SOLUTION: two trains leave chicago, one traveling east at 30 miles per hour and one traveling west at 40 miles per hour. when will the trains be 210 miles apart

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Question 214744: two trains leave chicago, one traveling east at 30 miles per hour and one traveling west at 40 miles per hour. when will the trains be 210 miles apart
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
The trains are moving apart at 70 mph
210/70=3 hrs