document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=320546>Question 320546</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two planes start from the same airport at the same time and travel in opposite directions. If the first plane travels at an average speed of 240 miles per hour and the second plane travels at an average speed of 320 miles per hour, in how many hours will the planes be 1400 miles apart? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #229643 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=229643\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> first plane travels at an average speed of 240 miles per hour<BR>\n" );
document.write( "second plane travels at an average speed of 320 miles per hour, <BR>\n" );
document.write( " 1400 miles apart?      \r<BR>\n" );
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document.write( "let them be 1400 miles apart after time t\r<BR>\n" );
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document.write( "distance traveled by plane A in time t = 240t<BR>\n" );
document.write( "distance traveled by plane B in time t = 320t\r<BR>\n" );
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document.write( "..<BR>\n" );
document.write( "320t+240t=1400<BR>\n" );
document.write( "560t=1400<BR>\n" );
document.write( "t=1400/560<BR>\n" );
document.write( "= 2.5 hours </SPAN>\n" );
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