document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=750129>Question 750129</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A motorboat can go 12 miles downstream on a river in 20 minutes. It takes 30 minutes for this boat to go back upstream the same 12 miles. Whats the speed of the boat in still water? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #456368 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=456368\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A motorboat can go 12 miles downstream on a river in 20 minutes. <BR>\n" );
document.write( "It takes 30 minutes for this boat to go back upstream the same 12 miles. <BR>\n" );
document.write( "Whats the speed of the boat in still water?<BR>\n" );
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document.write( "Downstream DATA:<BR>\n" );
document.write( "dist = 12 miles ; time = 1/3 hr ; rate = d/t = 36 mph<BR>\n" );
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document.write( "Upstream DATA:<BR>\n" );
document.write( "dist = 12 miles ; time = 1/2 hr ; rate = d/t = 24 mph<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "Downstream: b + c = 36 mph<BR>\n" );
document.write( "Upsteam ::: b - c = 24 mph<BR>\n" );
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document.write( "Solve for \"b\":<BR>\n" );
document.write( "2b = 60 mph<BR>\n" );
document.write( "b = 30 mph (speed of the boat in quiet water)<BR>\n" );
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document.write( "Solve for \"c\":<BR>\n" );
document.write( "2C = 12 mph<BR>\n" );
document.write( "c = 6 mph (speed of the current)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "==============<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );