document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=842540>Question 842540</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A stream is going 3 miles an hour. A boat travels upstream 12 miles and then returns to its original position downstream along the same route. If the speed of the boat in still water is 9 miles per hour, what is the average speed for the whole trip there and back? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #507609 by </B><A HREF=/tutors/aboutme.mpl?userid=hamsanash1981@gmail.com><B>hamsanash1981@gmail.com(151)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=hamsanash1981@gmail.com><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=507609\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> upstream = 9-3 = 6<BR>\n" );
document.write( "downstream = 9+3 = 12<BR>\n" );
document.write( "average speed = (2*12*6)/(12+6)<BR>\n" );
document.write( "=8 miles per hour </SPAN>\n" );
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