document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=332987>Question 332987</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At 10:30am two planes leave Houston, one flying east at 560km/h and the other flying west at 640km/h. At what time will they be 2100km apart? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #238609 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=238609\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> one plane speed = 560 km/h<BR>\n" );
document.write( "other plane speed = 640km/h<BR>\n" );
document.write( "..<BR>\n" );
document.write( "they are travelling in opposite directions<BR>\n" );
document.write( "so effective speed = 560+640= 1200 km/h<BR>\n" );
document.write( "..<BR>\n" );
document.write( "distance = 2100<BR>\n" );
document.write( "speed = 1200 km/h<BR>\n" );
document.write( "time = distance /speed<BR>\n" );
document.write( "time 2100/1200<BR>\n" );
document.write( "= 1.75 hours = 1 hour 45 minutes<BR>\n" );
document.write( "they left at 10.30 am.<BR>\n" );
document.write( "add 1 hour 45 minutes <BR>\n" );
document.write( "12.15 pm. the time they will be 2100 km apart<BR>\n" );
document.write( "CHECK<BR>\n" );
document.write( "(7/4 * 640)+(7/4 * 560) = 2100 km </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );