SOLUTION: Jim can run 5 miles per hour on level ground on a still day. One windy day he runs 15 miles with the wind and in the same amount of time runs 4 miles against the wind. What is the
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Question 846234: Jim can run 5 miles per hour on level ground on a still day. One windy day he runs 15 miles with the wind and in the same amount of time runs 4 miles against the wind. What is the rate of the wind? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = his time for running both
with the wind and against the wind
Let = the speed of the wind
--------------------------------
With the wind:
(1)
Against the wind:
(2)
---------------------
(1)
and
(2)
---------------------
Add the equations:
(1)
(2)
and
(2)
(2)
(2)
(2)
check:
(1)
(1)
(1)
(1)
and
(2)
(2)
(2)
(2)
close enough
The wind speed is 2.895 mi/hr
