document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1091722>Question 1091722</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You drive at an average of 30 miles per hour on the way to work, and at an average of 35 miles per hour on the way home. The total driving time is 30 minutes. How far away is work? Round your answer to the nearest hundredth of a mile.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #706197 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=706197\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You drive at an average of 30 miles per hour on the way to work, and at an average of 35 miles per hour on the way home. The total driving time is 30 minutes. How far away is work? Round your answer to the nearest hundredth of a mile.<BR>\n" );
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document.write( "Avg speed of a round-trip = 2*r1*r2/(r1+r2)<BR>\n" );
document.write( "= 2*20*35/(30+35) = 1400/65 = 280/13 mi/hr<BR>\n" );
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document.write( "d = r*t = (280/13)*(1/2) = 140/13 miles<BR>\n" );
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