Thanks Reiny!
John can run six miles per hour and Bill can run four miles per hour. If they run in opposite directions for two hours, then how far apart will they be?
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In two hours, John can run 6 x 2 = 12 miles.
Bill can run 4 x 2 = 8 miles.
If they go in opposite directions, they will be 20 miles apart in two hours.