document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=59796>Question 59796</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321279204/algebrahomeworkh>intermediate algebra </A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A plane flies 560mi in 1.75 hr traveling with the wind.  The return trip later against the same ind takes the plane 2 hrs.  Find the speed of the plane and the speed of the wind. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #41054 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=41054\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A plane flies 560mi in 1.75 hr traveling with the wind. The return trip later against the same ind takes the plane 2 hrs. Find the speed of the plane and the speed of the wind.<BR>\n" );
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document.write( "Downwind DATA:<BR>\n" );
document.write( "distance= 560 mi ; time = 1.75 hr ; rate = 560/1.75=320 mph<BR>\n" );
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document.write( "Upwind DATA:<BR>\n" );
document.write( "distance = 560 m ; time = 2 hr ; rate = 560/2=280 mph<BR>\n" );
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document.write( "EQUATIONS:<BR>\n" );
document.write( "Let speed of plane be \"s\" and velocity of wind be \"w\".<BR>\n" );
document.write( "s+w=320<BR>\n" );
document.write( "s-w=280<BR>\n" );
document.write( "Add the equations to get:<BR>\n" );
document.write( "2s=600<BR>\n" );
document.write( "s=300 mph (speed of the plane in still air)<BR>\n" );
document.write( "Substitute in one of the equations to find \"w\".<BR>\n" );
document.write( "300+w=320<BR>\n" );
document.write( "w=20 mph (speed of the wind)<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );