document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=28453>Question 28453</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average speed of a plane is 560 kilometers per hour. How long does it take the plane to travel 140 kilometers? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15701 by </B><A HREF=/tutors/aboutme.mpl?userid=emmychan><B>emmychan(11)</B></A><img src=\"/images/stars/stars-06.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=emmychan><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=15701\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since you know that an hour has 60 minutes, you can say that the plane travels 560k in 60 min. (or 560 / 60).  You also know that the plane has only traveled 140k and you need to know the min.  Use \"x\" for unknown min. You get the following equation.\r<BR>\n" );
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document.write( "(560/60) = (140/x)\r<BR>\n" );
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document.write( "Now you can use cross multiplication to solve for \"x\"<BR>\n" );
document.write( "(It helps to write the problem in columns <i.e. 560 over the 60>)\r<BR>\n" );
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document.write( "If you cross multiply, you get\r<BR>\n" );
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document.write( "560x = 60(140)<BR>\n" );
document.write( "560x = 8400\r<BR>\n" );
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document.write( "Divide both sides by 560\r<BR>\n" );
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document.write( "x = 15<BR>\n" );
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document.write( "Hope it helps.  :) </SPAN>\n" );
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