<PRE><B>Question 512601</B>
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Since he has already been walking for 1 and 1/2 hours  (distance divided by rate equals time, so 6 divided by 4 = 1.5), the entire trip for which he wants to average 6 miles per hour is 4 hours long (2.5 plus 1.5).  6 miles per hour times 4 hours is 24 miles.  He has already travelled 6 miles, so he needs to travel 18 more miles (24 minus 6) in 2.5 hours.  18 divided by 2.5.


He better find a bicycle.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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