document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189340>Question 1189340</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A 747 airplane is fully refueled before takeoff. The 747 uses approximately 600 gallons of fuel per minute while flying at the speed of 600 mph and approximately 500 gallons per minute while flying at the speed of 500 mph. The plane flies for 3 hours at the rate of 600 mph and then slows down for the last 2 hours to 500 mph. On this entire flight what was the average number of gallons per mile used by the airplane? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #820682 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=820682\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the plane uses 600 gallons per minute at 600 miles per hour and 500 gallons per minute at 500 miles per hour.\r<BR>\n" );
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document.write( "there are 60 minutes in an hour\r<BR>\n" );
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document.write( "the plane uses 600 * 60 = 36000 gallons per hour when the plane is traveling at 600 miles per hour.<BR>\n" );
document.write( "the plane uses 500 * 60 = 30000 gallons per hour when the plan is traveling at 500 miles per hour.\r<BR>\n" );
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document.write( "the plane flies at 600 miles per hour for 3 hours.<BR>\n" );
document.write( "the total number of miles traveled is 3 * 600 = 1800 miles.<BR>\n" );
document.write( "the total number of gallons used is 3 * 36000 = 108000 gallons.\r<BR>\n" );
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document.write( "the plane flies at 500 miles per hour for 2 hours.<BR>\n" );
document.write( "the total number of miles traveled is 2 * 500 = 1000 miles<BR>\n" );
document.write( "the total number of gallons used is 2 * 30000 = 60000 gallons.\r<BR>\n" );
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document.write( "the plane flew a total of 2800 miles and used a total of 168000 gallons.<BR>\n" );
document.write( "the average number of gallons per mile used by the plane was 168000 / 2800 = 60.\r<BR>\n" );
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