document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=118215>Question 118215</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane traveled 2660 miles in 3.5 hours with a tail wind.  The return trip took 3.8 hours with a head wind.  What was the speed of the airplane in still air?  What was the speed of the wind?  Solve by using a system oi\f equations. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #86311 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=86311\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An airplane traveled 2660 miles in 3.5 hours with a tail wind.  <BR>\n" );
document.write( "The return trip took 3.8 hours with a head wind.  <BR>\n" );
document.write( "What was the speed of the airplane in still air?  <BR>\n" );
document.write( "What was the speed of the wind?  <BR>\n" );
document.write( "Solve by using a system oi\f equations<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "Let airplane speed be \"p\"; Let wind speed be \"w\"<BR>\n" );
document.write( "---------------<BR>\n" );
document.write( "With-the-wind DATA:<BR>\n" );
document.write( "Distance = 2660 mi ; Time = 3.5 hrs ; Rate = d/t = 2660/3.5 = 760 mph<BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "Against-the-wind DATA:<BR>\n" );
document.write( "Distance = 2660 mi; Time = 3.8 hrs ; Rate = d/t = 2660/3.8 = 700 mph<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "EQUATIONS:<BR>\n" );
document.write( "p+w = 760<BR>\n" );
document.write( "P-w = 700<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "Add to get:<BR>\n" );
document.write( "2p = 1460<BR>\n" );
document.write( "p = 730 mph (speed of the place in still air)<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Solve for \"w\":<BR>\n" );
document.write( "p+w = 760<BR>\n" );
document.write( "730+w = 760<BR>\n" );
document.write( "w = 30 mph (speed of the wind)<BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );