document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=111108>Question 111108</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you help me please? This application problem I can't figure out.\r<BR>\n" );
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document.write( "Julie and Eric row their boat (at a constant speed) 55 miles downstream for 5hrs,helped by the current. Rowing at the same rate,the trip back against the current takes 11 hours. Find the rate of the current. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #81076 by </B><A HREF=/tutors/aboutme.mpl?userid=uma><B>uma(370)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=uma><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=81076\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Sure, I will help you.\r<BR>\n" );
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document.write( "Let x mil/hr be the speed of the boat and y mil / hr be that of the current.\r<BR>\n" );
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document.write( "Down stream they travelled 55 miles in 5 hrs\r<BR>\n" );
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document.write( "==> their speed = distance/time\r<BR>\n" );
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document.write( "                 = 55/5\r<BR>\n" );
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document.write( "                 = 11 miles/hr\r<BR>\n" );
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document.write( "Actually downstream the speed = speed of boat + speed of current\r<BR>\n" );
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document.write( "==> x + y = 11 ---------------(1)\r<BR>\n" );
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document.write( "Up stream they travelled 55 miles in 11 hrs<BR>\n" );
document.write( "==> their speed = distance/time<BR>\n" );
document.write( "                = 55/11<BR>\n" );
document.write( "                = 5 miles/hr\r<BR>\n" );
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document.write( "upstream the speed = speed of boat - speed of current<BR>\n" );
document.write( "==> x - y = 5  ---------------(2)\r<BR>\n" );
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document.write( "(1) - (2) gives 2y = 6\r<BR>\n" );
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document.write( "==>  y = 6/2<BR>\n" );
document.write( "       = 3\r<BR>\n" );
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document.write( "Thus the speed of the current = 3 miles/hr\r<BR>\n" );
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document.write( "Good luck!!! </SPAN>\n" );
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