document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=392527>Question 392527</A>: <I><SPAN STYLE=\"word-break: break-all;\"> two cars leave town at the same time going the same direction. One travels 30 mph and the other 46 mph. In how many hours will they be 72 miles apart? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #278575 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=278575\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Relative to the first car, the second car (the faster one) travels 16 mph. It takes 4.5 hours to cover a displacement of 72 miles (since 72/16 = 4.5), so 4.5 hours.\r<BR>\n" );
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document.write( "The standard way simply uses a bit of elementary algebra. At some time t, 30t and 46t will be separated by 72 miles. Therefore,\r<BR>\n" );
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document.write( "46t - 30t = 72 mi\r<BR>\n" );
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document.write( "16t = 72\r<BR>\n" );
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document.write( "t = 4.5 hr </SPAN>\n" );
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