Question 1199975
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let w be the wind speed.  Then the two speeds with and against the wind are 7+w and 7-w.<br>
The ratio of the distances is 54:30 = 9:5.  Since the times are the same, the ratio of speeds is also 9:5.<br>
{{{(7+w)/(7-w)=9/5}}}<br>
The equation can be solved by inspection, although formal algebra could be used.<br>
ANSWER: w = 2<br>