SOLUTION: Jim can run 5 miles per hour on level ground on a still day. One windy day, he runs 10 miles per hour with the wind, and in the same amount of time runs 7 miles against the wind.
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Question 28909: Jim can run 5 miles per hour on level ground on a still day. One windy day, he runs 10 miles per hour with the wind, and in the same amount of time runs 7 miles against the wind. What is the rate of the wind.
Can you please help me set this up, I can't figure out how to write the equations. Answer by Paul(988) (Show Source):
You can put this solution on YOUR website! His speed of the stillground = 5mph
Let the speed of the wind be x
Equation:
Cross multiply:
7(5+x)=10(5-x)
35+7x=50-10x
17x=15
x=0.88 (rounded)
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