document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=742105>Question 742105</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The speed of a boat in still water is 8 km/h. It travels 60 km upstream and 60 km downstream in a total time of 16 hours. What is the speed of the stream? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #452280 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=452280\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> speed of stream =x\r<BR>\n" );
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document.write( "speed of boat in still water =8\r<BR>\n" );
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document.write( "time down stream = 60/(8+x)\r<BR>\n" );
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document.write( "time down stream = 60/(8-x)\r<BR>\n" );
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document.write( "time up + time down = 16 hours\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60%2F%288-x%29+%2B60%2F%288%2Bx%29+=+16 ALIGN=MIDDLE  ALT=\"60%2F%288-x%29+%2B60%2F%288%2Bx%29+=+16\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Multiply equation by (8-x)(8+x)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=60%288%2Bx%29%2B60%288-x%29=16%2864-x%5E2%29 ALIGN=MIDDLE  ALT=\"60%288%2Bx%29%2B60%288-x%29=16%2864-x%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=480%2B60x%2B480-60xx=1024-16x%5E2 ALIGN=MIDDLE  ALT=\"480%2B60x%2B480-60xx=1024-16x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16x%5E2=1024-960 ALIGN=MIDDLE  ALT=\"16x%5E2=1024-960\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16x%5E2=64 ALIGN=MIDDLE  ALT=\"16x%5E2=64\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "x^2=4\r<BR>\n" );
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document.write( "x= +/- 2\r<BR>\n" );
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document.write( "ignore negative\r<BR>\n" );
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document.write( "x=2\r<BR>\n" );
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document.write( " </SPAN>\n" );
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