SOLUTION: A man rode a bicycle for 12 miles and then hiked and additional 8 miles. The total time for the trip was 5 hours. If his rate when riding a bicycle was 10 miles per hour faster tha
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Question 528170: A man rode a bicycle for 12 miles and then hiked and additional 8 miles. The total time for the trip was 5 hours. If his rate when riding a bicycle was 10 miles per hour faster than his rate walking, what was each rate?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = rate walking
Let = rate biking
given:
mi/hr
hrs
--------------------
biking:
walking:
-------------------
By substitution:
By substitution again:
Substitution again:
Completing the square:
( can't use the negative root )
and
His speed biking was 12 mi/hr
His speed walking was 2 mi/hr
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