document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1173836>Question 1173836</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The president of a company traveled 1600 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 10 h. Find the rate of the jet. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #799166 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=799166\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The other tutor provided a good formal algebraic solution to the problem.<br><BR>\n" );
document.write( "If formal algebra is not required, note that a quick informal solution can be obtained by using logical reasoning and some simple mental arithmetic.<br><BR>\n" );
document.write( "Since the rate of the jet is 4 times the rate of the prop plane, 1600 miles by jet is equivalent to 400 miles in the prop plane.<BR>\n" );
document.write( "That makes the trip equivalent to 700 miles on the prop plane in 10 hours.<BR>\n" );
document.write( "That makes the speed of the prop plane 700/10 = 70mph; and then the speed of the jet is 4 times that, or 280mph.<br><BR>\n" );
document.write( "ANSWER: 280 mph for the jet.<br><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );