SOLUTION: A train leaves and travels north at 85 km per hour. Another train leaves at the same time and travels S at 55 km per hour. How long will it take before they are 560 km apart?

Question 704397: A train leaves and travels north at 85 km per hour. Another train leaves at the same time and travels S at 55 km per hour. How long will it take before they are 560 km apart?
Found 2 solutions by Stitch, Alan3354:
Answer by Stitch(470) (Show Source): You can put this solution on YOUR website!
The two distances are added together since they are the distance of each train to the starting point.
Combine like terms

Divide both sides by 140

In 4 hours the trains will be 560km apart.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A train leaves and travels north at 85 km per hour. Another train leaves at the same time and travels S at 55 km per hour. How long will it take before they are 560 km apart?
--------------------------
The speeds are added when going in opposite directions.
----
d = r*t
t = d/r

RELATED QUESTIONS
a train leaves Kansas City, Kansas and travels north at 85 km per hour. Another train... (answered by drj)
A train leaves Little Rock, AK and travels north at 55 kilometers per hour. Another train (answered by solver91311)
A train leaves Kansas City, Kansas and travels north at 85 km. per hr. Another train... (answered by harpazo)
A train leaves Kansas City, Kansas, and travels north at 85 km per hour. Another train... (answered by rfer)
A train leaves Little Rock,Arkansas, and travels north at 85 kilometers per hour.... (answered by mananth)
A train leaves Washington and travels north at 85 miles per hour. Another train leaves... (answered by josmiceli)
A train leaves Little Rock, Arkansas, and travels north at 90 kilometers per hour.... (answered by macston)
A train leaves Arkansas, and travels north at 80 kilometers per hour. Another train... (answered by stanbon)
A train leaves the station traveling north at 85 kilometers per hour. Another train... (answered by stanbon)