document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=928640>Question 928640</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plane traveled 924 miles to Seattle and back. The trip there was with the wind. It took 11 hours. The trip back was into the wind. The trip back took 22 hours. what is the speed of the plane in still air? What is the speed of the wind? \r<BR>\n" );
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document.write( "I have an answer but do not know if it is right. I got 63 mph is how fast the plane is going in still air and I got that the speed of the wind was 21 mph. </SPAN>\n" );
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document.write( "A plane traveled 924 miles to Seattle and back. The trip there was with the wind. It took 11 hours. The trip back was into the wind. The trip back took 22 hours. what is the speed of the plane in still air? What is the speed of the wind? \r<BR>\n" );
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document.write( "I have an answer but do not know if it is right. I got 63 mph is how fast the plane is going in still air and I got that the speed of the wind was 21 mph.<BR>\n" );
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document.write( "Let speed of plane, in still air, and speed of wind be S, and W, respectively\r<BR>\n" );
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document.write( "Average speed to Seattle: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=924%2F11 ALIGN=MIDDLE  ALT=\"924%2F11\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or 84 mph<BR>\n" );
document.write( "Traveling with the wind, we can say that: S + W = 84 ------ eq (i) \r<BR>\n" );
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document.write( "Average speed from Seattle: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=924%2F22 ALIGN=MIDDLE  ALT=\"924%2F22\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or 42 mph<BR>\n" );
document.write( "Traveling against the wind, we can say that: S - W = 42 ------ eq (ii) <BR>\n" );
document.write( "2S = 126 ---------- Adding eqs (ii) & (i)<BR>\n" );
document.write( "S, or speed of plane, in still air = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=126%2F2 ALIGN=MIDDLE  ALT=\"126%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%2863%29 ALIGN=MIDDLE  ALT=\"highlight_green%2863%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph\r<BR>\n" );
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document.write( "63 + W = 84 -------- Substituting 63 for S in eq (i)<BR>\n" );
document.write( "W = 84 – 63<BR>\n" );
document.write( "W, or speed of wind = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%2821%29 ALIGN=MIDDLE  ALT=\"highlight_green%2821%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph\r<BR>\n" );
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document.write( "You’re 100% correct!! Good job!! </SPAN>\n" );
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