document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1719>Question 1719</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have 2 questions!\r<BR>\n" );
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document.write( "1. The speed of a stream is 6MPH. If a boat travels 92 miles downstream in the same time that it takes to travel 46 miles upstream, what is the speed of boat in still water.  ( I know the answer is 18 MPH, just need to know the solution)\r<BR>\n" );
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document.write( "2. Martha can rake the leaves in her yard in 2 hours. Her younger brother can do the job in 3 hours. How long will it take them to do the job if they work together.   ( I know the answer is 5/6 hours, just need to know the solution) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #601 by </B><A HREF=/tutors/aboutme.mpl?userid=longjonsilver><B>longjonsilver(2297)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=longjonsilver><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=longjonsilver><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=601\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ok...first define speed of boat in still water to be v (or whatever letter you want).\r<BR>\n" );
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document.write( "downstream, its speed is v+6. Upstream, its speed is v-6.\r<BR>\n" );
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document.write( "Now, speed = distance/time, so:\r<BR>\n" );
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document.write( "downstream: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28v%2B6%29=%2892%29%2Ft ALIGN=MIDDLE  ALT=\"%28v%2B6%29=%2892%29%2Ft\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "upstream:   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28v-6%29=%2846%29%2Ft ALIGN=MIDDLE  ALT=\"%28v-6%29=%2846%29%2Ft\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Re-arranging these 2 and equating for t, gives:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2892%29%2F%28v%2B6%29+=+%2846%29%2F%28v-6%29 ALIGN=MIDDLE  ALT=\"%2892%29%2F%28v%2B6%29+=+%2846%29%2F%28v-6%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Re-arranging again gives v=18mph\r<BR>\n" );
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document.write( "2. using speed=distance/time as a start, where distance, d, is the area covered really...\r<BR>\n" );
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document.write( "speed of martha = d/2<BR>\n" );
document.write( "speed of brother = d/3\r<BR>\n" );
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document.write( "together, their speed is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28d%2F2%29+%2B+%28d%2F3%29 ALIGN=MIDDLE  ALT=\"%28d%2F2%29+%2B+%28d%2F3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and they cover the same space..the yard, so distance is still d...just need to find the time...\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28d%2F2%29+%2B+%28d%2F3%29+=+%28d%2Ft%29 ALIGN=MIDDLE  ALT=\"%28d%2F2%29+%2B+%28d%2F3%29+=+%28d%2Ft%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "cancel the d's gives...\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281%2F2%29+%2B+%281%2F3%29+=+%281%2Ft%29 ALIGN=MIDDLE  ALT=\"%281%2F2%29+%2B+%281%2F3%29+=+%281%2Ft%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, giving\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%285%2F6%29+=+%281%2Ft%29 ALIGN=MIDDLE  ALT=\"%285%2F6%29+=+%281%2Ft%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%286%2F5%29 ALIGN=MIDDLE  ALT=\"t+=+%286%2F5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > hours.\r<BR>\n" );
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document.write( "So, hopefully, you have misread the answer. Alternatively, I have the answer wrong!!!\r<BR>\n" );
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document.write( "cheers<BR>\n" );
document.write( "Jon. </SPAN>\n" );
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