document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=926314>Question 926314</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Randy made a trip of 190 miles. he averages 52mph on way there on way back he averaged 56mph. Total trip took 3.5 hours, how long did travel at each rate? How do you set the problem up </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #562151 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=562151\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Randy made a trip of 190 miles. he averages 52mph on way there on way back he averaged 56mph. Total trip took 3.5 hours, how long did travel at each rate? How do you set the problem up<BR>\n" );
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document.write( "There's more than 1 way, but the simplest is to use the formula\r<BR>\n" );
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document.write( "Avg = 2*52*56/(52+56) for the round trip avg speed.<BR>\n" );
document.write( "Avg = 5824/108 = 1456/27 mi/hr<BR>\n" );
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document.write( "d = r*t = (1456/27)*3.5 = 5096/27 miles RT<BR>\n" );
document.write( "Distance each way = 2548/27 miles<BR>\n" );
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document.write( "t = d/r<BR>\n" );
document.write( "Going, t = (2548/27)/52 = 49/27 mi/hr<BR>\n" );
document.write( "Return, t = (2548/27)/56 = 91/54 mi/hr<BR>\n" );
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document.write( "I don't recommend memorizing a formula for everything, but this one is similar to parallel flows, parallel work, parallel resistors, etc.  Just a factor of 2 different. </SPAN>\n" );
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