Asked by Math

Alice walks on a straight line at four miles per hour. Two hours after she begins walking, Bob runs after her at a rate of six miles per hour. How fast (in miles per hour) is Bob gaining on Alice?
Answered by Steve
6-4
Answered by Reiny
You posted this yesterday
http://www.jiskha.com/display.cgi?id=1476153606

Why did you post it again today?
Answered by Math
I trust Steve
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