SOLUTION: Suppose Josh runs from Point A to Point B at a rate of 12 mph and walks back from Point B to Point A at a rate of 4 mph. If the total time it takes Josh to run and walk is 80 minut
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Question 962804: Suppose Josh runs from Point A to Point B at a rate of 12 mph and walks back from Point B to Point A at a rate of 4 mph. If the total time it takes Josh to run and walk is 80 minutes, how long does it take Josh to walk back from Point B to Point A?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Running from A to B:
(1)
-------------------
Walking from B to A:
(2)
-------------------
hrs
(3) hrs
( note that I converted minutes to hrs )
-----------------------------------
Set (1) and (2) equal to each other
Substitute this into (3)
and
-------------------
Walking back from B to A takes
him 1 hr
------------
check:
(1)
(1)
(1) mi
------------------
(2)
(2)
(2) mi
OK
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