SOLUTION: Jon walked 5 miles to school then ran the same distance home. His speed on the trip home was 5 miles faster than the speed he had walked. If the trip home took 45 minutes less time
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Question 182633: Jon walked 5 miles to school then ran the same distance home. His speed on the trip home was 5 miles faster than the speed he had walked. If the trip home took 45 minutes less time, what was his walking speed?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Walking to school:
(1)
Running home:
(2)
given:
(3) mi
(4) mi
(5) hr
(6) mi/hr
---------------------------
Now I can rewrite (1) and (2)
(1)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
----------------------------
For now I'll say and use the
quadratic formula
hr
(1)
(1)
mi/hr
His walking speed was 3.79 mi/hr
------------------------------
check answer
(6) mi/hr
mi/hr
(1)
hr
(5) hr
hr
---------------------
(1)
(2)
close enough
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