document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=187675>Question 187675</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An airplane flew for 4hr with a 20-mph tailwind. The return flight against the same wind took 5 hr. Find the speed of the plane in still air.<BR>\n" );
document.write( "Can anyone help me? I do not know how to even start.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #140706 by </B><A HREF=/tutors/aboutme.mpl?userid=sridhar><B>sridhar(2)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sridhar><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=140706\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "S = V * T<BR>\n" );
document.write( "S = (V + 20) * 4<BR>\n" );
document.write( "S = (v - 20) * 5<BR>\n" );
document.write( "So, (V + 20) * 4 = (v - 20) * 5<BR>\n" );
document.write( "4V + 80 = 5V - 100<BR>\n" );
document.write( "v = 180<BR>\n" );
document.write( "Speed of the plane = 180 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );