document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1199975>Question 1199975</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A military drone can fly at 7 miles per hour in calm conditions. For one flight, the drone flew 54 miles with the wind and 30 miles against the wind in the same amount of time. What was the wind speed for the flight? (Do not include the units in your response.)<BR>\n" );
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document.write( "let w be the wind speed.  Then the two speeds with and against the wind are 7+w and 7-w.<br><BR>\n" );
document.write( "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><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%287%2Bw%29%2F%287-w%29=9%2F5 ALIGN=MIDDLE  ALT=\"%287%2Bw%29%2F%287-w%29=9%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The equation can be solved by inspection, although formal algebra could be used.<br><BR>\n" );
document.write( "ANSWER: w = 2<br><BR>\n" );
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