document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1056349>Question 1056349</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A plane flies 420 miles with the wind and 300 miles against the wind in the same length of time. If the speed of the wind is 23 &#8203;mph, what is the speed of the plane in still&#8203; air? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #671498 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=671498\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  A plane flies 420 miles with the wind and 300 miles against the wind in the same length of time. If the speed of the wind is 23 &#8203;mph, what is the speed of the plane in still&#8203; air? <BR>\n" );
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document.write( "With-wind DATA ::<BR>\n" );
document.write( "dist = 420 miles ; rate = p+23 ; time = d/r = 420/(p+23) hrs<BR>\n" );
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document.write( "Against-wind DATA:<BR>\n" );
document.write( "dist = 300 miles ; rate = p-23 ; time = d/r = 300/(p-23) hrs<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "420/(p+23) = 300/(p-23)<BR>\n" );
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document.write( "7/(p+23) = 5/(p-23)<BR>\n" );
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document.write( "7p-161 = 5p+115<BR>\n" );
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document.write( "2p = 276<BR>\n" );
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document.write( "p = 138 mph (speed of the plane in still air)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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