document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=317902>Question 317902</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Pamela requires 3 hours to swim 15 miles downstream in the illinois river. The return trip upstream takes 5 hours. Find Pamela's average speed in still water. How fast is the current?( assume that Pamela's speed is the same in each direction) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #227631 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=227631\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Pamela requires 3 hours to swim 15 miles downstream in the illinois river. <BR>\n" );
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document.write( "time = 3 hrs; distance = 15 miles ; rate = d/t = 15/3 = 5 mph<BR>\n" );
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document.write( "The return trip upstream takes 5 hours.<BR>\n" );
document.write( "time = 5 hrs; distance = 15 miles ; rate = 15/5 = 3 mph<BR>\n" );
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document.write( "Find Pamela's average speed in still water. <BR>\n" );
document.write( "How fast is the current?( assume that Pamela's speed is the same in each direction)<BR>\n" );
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document.write( "Let her swim speed be \"s\":<BR>\n" );
document.write( "Let the current speed be \"c\";<BR>\n" );
document.write( "Equations:<BR>\n" );
document.write( "Down stream: s + c = 5 mph<BR>\n" );
document.write( "up-stream::: s - c = 3 mph<BR>\n" );
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document.write( "Add the two equations and solve for \"s\"<BR>\n" );
document.write( "2s = 8 mph<BR>\n" );
document.write( "s = 4 mph (Pamel's speed in still water.<BR>\n" );
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document.write( "Since s+c=5, c = 1 mph (speed of the current)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( " </SPAN>\n" );
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