SOLUTION: Two runners leave from the same location traveling in opposite directions. The first runner is running at 8 mph and the second is running at 10 mph. How long have they been running

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 Click here to see ALL problems on Travel Word Problems Question 548973: Two runners leave from the same location traveling in opposite directions. The first runner is running at 8 mph and the second is running at 10 mph. How long have they been running when they are 36 miles apart?Answer by mananth(12270)   (Show Source): You can put this solution on YOUR website!They are running in opposite directions so effective speed = 10+8 = 18 mph d=36 time = 36/18 = 2 hours