document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=635312>Question 635312</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Boat goes120 miles upstream in 20 hours and downstream in 10 hours. What is the speed of the boat and speed of the current? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #400237 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=400237\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Boat goes120 miles upstream in 20 hours and downstream in 10 hours. What is the speed of the boat and speed of the current?<BR>\n" );
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document.write( "Upstream rate = 120/20 = 6 mph<BR>\n" );
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document.write( "Downstream rate = 120/10 = 12 mph<BR>\n" );
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document.write( "Equations:<BR>\n" );
document.write( "Upstream rate: b - c = 6 mph<BR>\n" );
document.write( "Downstream rate: b + c = 12 mph<BR>\n" );
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document.write( "Add and solve for \"b\":<BR>\n" );
document.write( "2b = 18 mph<BR>\n" );
document.write( "boat speed = 9 mph<BR>\n" );
document.write( "000<BR>\n" );
document.write( "solve for \"c\":<BR>\n" );
document.write( "b + c = 12<BR>\n" );
document.write( "9 + c = 12<BR>\n" );
document.write( "current speed = 3 mph<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================ </SPAN>\n" );
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