Solve.
-Jim can run 5 miles per hour on level ground on a still day. One windy day, he runs 11 miles with the wind, and in the same amount of time runs 7 miles against the wind. What is the rate of the wind?
A) $1 \frac { 1 } { 9 } \mathrm { mph }$
B) $2 \mathrm { mph }$
C) $5 \mathrm { mph }$
D) $22 \frac { 1 } { 2 } \mathrm { mph }$

Question

Quizplus · Accepted Answer

Let $x$ be the rate of the wind. Then, the rate of Jim with the wind is $5+x$ mph and the rate of Jim against the wind is $5-x$ mph. Since he runs 11 miles with the wind and 7 miles against the wind in the same amount of time, we have:$$\frac{11}{5+x}=\frac{7}{5-x}$$Solving for $x$, we get:$$x=2\text{ mph}$$

Solve -Jim Can Run 5 Miles Per Hour on Level 119mph1 \frac { 1 } { 9 } \mathrm { mph }191​mph

Solve
-Jim Can Run 5 Miles Per Hour on Level $1 \frac { 1 } { 9 } \mathrm { mph }$