SOLUTION: Travel up a hill at 3 miles per hour and down the hill at 6 miles per hour on the same trail, what is the average speed traveled? Teacher says it is not 4.5 mph.

Question 281742: Travel up a hill at 3 miles per hour and down the hill at 6 miles per hour on the same trail, what is the average speed traveled? Teacher says it is not 4.5 mph.
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
teacher is right

since the size of the hill is not a factor, let's say the hill is 6 miles long

it takes 2 hours to go up (6/3), and one hour to come down (6/6)

so you spend 3 hours going 12 miles ___ 12 / 3 = 4 mph
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