document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1114704>Question 1114704</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A remote-controlled boat can travel at 4 feet per second in calm water. For a specific trip, the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. How fast is 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 #729611 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=729611\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> distance=rate*time; rate= speed of boat (b)+ speed of current (c) or 4+c down stream and 4-c upstream<BR>\n" );
document.write( "48=(4+c)* time<BR>\n" );
document.write( "16=(4-c)*time\r<BR>\n" );
document.write( "\n" );
document.write( "time is the same<BR>\n" );
document.write( "time=48/(4+c)<BR>\n" );
document.write( "time=16/(4-c)<BR>\n" );
document.write( "set the two equal.\r<BR>\n" );
document.write( "\n" );
document.write( "48/(4+c)=16/(4-c)<BR>\n" );
document.write( "cross-multiply<BR>\n" );
document.write( "192-48c=64+16c<BR>\n" );
document.write( "64c=128<BR>\n" );
document.write( "c=2 feet per second  ANSWER<BR>\n" );
document.write( "boat goes 6 ft/sec downstream and takes 8 seconds to go 48 feet<BR>\n" );
document.write( "boat goes 2 ft/sec upstream and takes 8 seconds to go 16 feet </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );