document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=447457>Question 447457</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the president of a company travels 1800 mi by jet and 300 mi on a prop plane. the rate of the jet was four times the rate of the prop plane. the entire trip took a total of 5 h. find the rate of the jet plane. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #308037 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=308037\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let r = the rate of the jet plane<BR>\n" );
document.write( "Then r/4 = the rate of the prop plane<BR>\n" );
document.write( "Since time = distance/rate, we can write the following formula for the time of the trip:<BR>\n" );
document.write( "5 = 1800/r + 300/(r/4)<BR>\n" );
document.write( "5 = 1800/r + 1200/r<BR>\n" );
document.write( "Solve for r:<BR>\n" );
document.write( "(1800 + 1200)/r = 5<BR>\n" );
document.write( "3000 = 5r<BR>\n" );
document.write( "r = 600 mph<BR>\n" );
document.write( "Therefore the rate of the jet is 600 mph </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );