document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=715110>Question 715110</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 3.	If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are ________?<BR>\n" );
document.write( "a. 7 &16 mph	b. 7&17		c. 6 &17 mph	d. 6 &18		e. none<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 #439267 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=439267\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively<BR>\n" );
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document.write( "Find the 2 groundspeeds (speed wrt Earth)<BR>\n" );
document.write( "The boat's speed is the average of the 2.<BR>\n" );
document.write( "The current is the difference between boat speed and groundspeed.<BR>\n" );
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