Question 1147421
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Here is a different way to get to the answer -- much faster than with the traditional algebraic methods shown by the other tutors.<br>
The distances uphill and downhill are the same; since the ratio of the times is 3.5:2.5 = 7:5, the ratio of speeds is 5:7.<br>
But 7mph is 2mph faster than 5mph; so the two speeds are 5mph and 7mph.<br>
5mph times 3.5 hours equals 17.5 miles; or 7mph times 2.5mph equals 17.5 miles.<br
ANSWER: 17.5 miles