document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=215095>Question 215095</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It took a patrol boat 5 hours to travel 60km up a river against the current, and 3 hours for the return trip with the current. Find the speed of the boat in still water and the speed of the current.\r<BR>\n" );
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document.write( "Can you please solve this, i cant seem to figure the answer when they mention still water.  please can you show me how you do it please!\r<BR>\n" );
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document.write( "please and thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #162540 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=162540\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It took a patrol boat 5 hours to travel 60km up a river against the current, and 3 hours for the return trip with the current. Find the speed of the boat in still water and the speed of the current. <BR>\n" );
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document.write( "Let rate of the current be \"c\":<BR>\n" );
document.write( "Let speed of the boat be \"b\":<BR>\n" );
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document.write( "Upstream DATA:<BR>\n" );
document.write( "time = 5 hrs ; distance = 60 km ; rate = d/t = 60/5 = 12 km/h<BR>\n" );
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document.write( "Downstream DATA:<BR>\n" );
document.write( "time = 3 hrs ; distance = 60 km ; rate = d/t = 60/3 = 20 km/h<BR>\n" );
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document.write( "Equations:<BR>\n" );
document.write( "b-c = 12 km/h<BR>\n" );
document.write( "b+c = 20 km/h<BR>\n" );
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document.write( "Add to get:<BR>\n" );
document.write( "2b = 32<BR>\n" );
document.write( "b = 16 km/h (speed of the boat in still water)<BR>\n" );
document.write( "Substitute into b+c = 20 to get c = 4 km/h (speed of the current)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================================== </SPAN>\n" );
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