SOLUTION: Two trains leave a station at the same time but travel in opposite directions. One moves at a constant speed of 140 km/h while the other rolls along at a speed of 120 km/h. How lon
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Question 1053702: Two trains leave a station at the same time but travel in opposite directions. One moves at a constant speed of 140 km/h while the other rolls along at a speed of 120 km/h. How long does it take for the distance between the trains to reach 390 km?
Answer by ikleyn(52772) (Show Source): You can put this solution on YOUR website!
.
= = hour = 1 hour and 30 minutes.
The sum (140+120) in the denominator is the rate of increasing the distance between the trains (in km/h).
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