document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=853229>Question 853229</A>: <I><SPAN STYLE=\"word-break: break-all;\"> problem: An airplane made a trip of 200 miles against the wind in 1 hour. returning with the wind, the trip took only 50 minutes. Find the speed of the plane in calm air and the speed of the wind\r<BR>\n" );
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document.write( "For this I'm guessing I have to find two equations that relate speed, time and distance:<BR>\n" );
document.write( "I used Y for the speed of the wind and X for the speed of the airplane\r<BR>\n" );
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document.write( "X-Y = 200m/h\r<BR>\n" );
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document.write( "X+Y = 200m x 50min  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #513977 by </B><A HREF=/tutors/aboutme.mpl?userid=JulietG><B>JulietG(1812)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=JulietG><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=JulietG><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=513977\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let X be the airplane's speed<BR>\n" );
document.write( "Let Y be the wind's speed (assuming it is constant)<BR>\n" );
document.write( "Here's what we know from the problem:<BR>\n" );
document.write( "X - Y = 200<BR>\n" );
document.write( "X + Y = 240 (60min/50 min * 200)<BR>\n" );
document.write( "Add together<BR>\n" );
document.write( "2X = 440<BR>\n" );
document.write( "X = 220<BR>\n" );
document.write( "If the airplane's speed is 220mph, then the wind is 20mph (Subtract 20 heading into it, add 20 traveling with it).<BR>\n" );
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document.write( "That's exactly what you had, you just needed to go one step further. </SPAN>\n" );
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