SOLUTION: While hiking the Peralta Trail to Wheeler�s Needle and back, Rick spent 60% of his time walking uphill to Wheeler�s Needle and 40% of his time returning by the same trail. If he a

Question 304549: While hiking the Peralta Trail to Wheeler�s Needle and back, Rick spent 60% of his time walking uphill to Wheeler�s Needle and 40% of his time returning by the same trail. If he averaged 2 miles per hour uphill, what was his average speed for the round-trip?
A. 2 1/3 mph B. 2.25 mph C. 2.4 mph D. 2.5 mph E. 2.6 mph
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = his time walking uphill
The ratio (time walking uphill)/(time walking downhill) =
t/(time walking downhill) =
= time walking downhill
For uphill:

For downhill:

mi/hr
------------------
The average speed is (total distance)/(total time)
Total distance =
The time for uphill =
The time for downhill =

mi/hr
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