document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=134374>Question 134374</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat travels 60km upstream in 5 hours. The boat travles the same distance downstream in 3 hours. Whatis the rate of the boat in still water? what is the rate of the current?\r<BR>\n" );
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document.write( "okay I really tried, but i just can't get it...\r<BR>\n" );
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document.write( "s=d/T<BR>\n" );
document.write( "s=60/5=12<BR>\n" );
document.write( "60/3<BR>\n" );
document.write( "12-10=2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #98291 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=98291\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A boat travels 60km upstream in 5 hours. The boat travels the same distance downstream in 3 hours. What is the rate of the boat in still water? what is the rate of the current?<BR>\n" );
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document.write( "Let s = speed of the boat in still water<BR>\n" );
document.write( "Let c = speed of the current<BR>\n" );
document.write( "Then<BR>\n" );
document.write( "(s+c) = speed downstream<BR>\n" );
document.write( "and<BR>\n" );
document.write( "(s-c) = speed upstream<BR>\n" );
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document.write( "We can write two distance equations, one upstream, on downstream<BR>\n" );
document.write( "Dist = time * speed<BR>\n" );
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document.write( "5(s-c) = 60<BR>\n" );
document.write( "3(s+c) = 60<BR>\n" );
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document.write( "We can simplify both equations, divide the 1st one by 5, and the 2nd one by 3<BR>\n" );
document.write( "s - c = 12<BR>\n" );
document.write( "s + c = 20<BR>\n" );
document.write( "------------adding equations eliminates c, find s<BR>\n" );
document.write( "2s + 0 = 32<BR>\n" );
document.write( "s = 32/2<BR>\n" );
document.write( "s = 16 km/hr is speed in still water<BR>\n" );
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document.write( "Find c using the 2nd simplified equation<BR>\n" );
document.write( "s + c = 20<BR>\n" );
document.write( "16 +c = 20<BR>\n" );
document.write( "c = 20 - 16<BR>\n" );
document.write( "c = 4 km/hr is the speed of the current<BR>\n" );
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document.write( "Check solution in one of the original equations<BR>\n" );
document.write( "5(16 - 4) =  60; confirms our solutions </SPAN>\n" );
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