document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=695477>Question 695477</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The speed of a stream is 3 km/h. A boat travels 4 km upstream in the<BR>\n" );
document.write( "same time it takes to travel 10 km downstream. What is the speed of<BR>\n" );
document.write( "the boat. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #428499 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=428499\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The speed of a stream is 3 km/h. A boat travels 4 km upstream in the<BR>\n" );
document.write( "same time it takes to travel 10 km downstream. What is the speed of<BR>\n" );
document.write( "the boat.<BR>\n" );
document.write( "**<BR>\n" );
document.write( "let x=speed of the boat in still water<BR>\n" );
document.write( "x-3=speed upstream<BR>\n" );
document.write( "x+3=speed downstream<BR>\n" );
document.write( "travel time=distance/speed (same for upstream and downstream)<BR>\n" );
document.write( "4/(x-3)=10/(x+3)<BR>\n" );
document.write( "10x-30=4x+12<BR>\n" );
document.write( "6x=42<BR>\n" );
document.write( "x=6<BR>\n" );
document.write( "speed of the boat in still water=6 km/hr </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );