document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=432608>Question 432608</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Air Travel. Two airplanes start at the same time and fly<BR>\n" );
document.write( "toward each other from points 1000 km apart at rates of<BR>\n" );
document.write( "420 km/h and 330 km/h . After how many hours will<BR>\n" );
document.write( "they meet? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #299962 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel1380><B>jorel1380(3719)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel1380><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=jorel1380><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=299962\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If two planes start at the same time and fly toward each other, then their respective velocities can be added to each other. Since they are going 420 and 330, respectively, then:<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "(420 km/h + 330 km/h)x hrs.=1000km<BR>\n" );
document.write( "750 km/h * x hrs.=1000km<BR>\n" );
document.write( "x=1000/750 hrs.<BR>\n" );
document.write( "\"\"=4/3 hrs<BR>\n" );
document.write( "Which equals 1hr. 20min. before they crash into each other. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );