document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=142033>Question 142033</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The speed of a stream is 6 mph. If a boat travels 98 miles downstream in the same time that it takes to travel 49 miles upstream, what is the speed of the boat in still water? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #103437 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.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/cgi-bin/show-face.mpl?user=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=103437\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> he speed of a stream is 6 mph. If a boat travels 98 miles downstream in the same time that it takes to travel 49 miles upstream, what is the speed of the boat in still water?<BR>\n" );
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document.write( "Let s = speed in still water<BR>\n" );
document.write( "then<BR>\n" );
document.write( "(s-6) = speed upstream (in relation to the land)<BR>\n" );
document.write( "and<BR>\n" );
document.write( "(s+6) = speed downstream<BR>\n" );
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document.write( "Write a time equation: Time = dist/speed<BR>\n" );
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document.write( "Time downstream = time upstream<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=98%2F%28s%2B6%29 ALIGN=MIDDLE  ALT=\"98%2F%28s%2B6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=49%2F%28s-6%29 ALIGN=MIDDLE  ALT=\"49%2F%28s-6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cross multiply<BR>\n" );
document.write( "98(s-6) = 49(s+6)<BR>\n" );
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document.write( "98s - 588 = 49s + 294<BR>\n" );
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document.write( "98s - 49s = 294 + 588<BR>\n" );
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document.write( "49s = 882<BR>\n" );
document.write( "s = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=882%2F49 ALIGN=MIDDLE  ALT=\"882%2F49\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "s = 18 mph in still water<BR>\n" );
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document.write( "Check solution by finding out if the times are equal<BR>\n" );
document.write( "12 mph = speed up<BR>\n" );
document.write( "24 mph = speed down<BR>\n" );
document.write( "49/12 = 4.0833<BR>\n" );
document.write( "98/24 = 4.0833\r<BR>\n" );
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document.write( " </SPAN>\n" );
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