document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=84535>Question 84535</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321227573/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> JOan took 20 min to drive her boat upstream to water ski at her favorite spot. Coming back later in the day, at the same boat speed, took her 15 min. If the current in that part of the river is 5km per hr,what was her boat speed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #60876 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley75><B>checkley75(3666)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley75><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=60876\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> DISTANCE=RATE*TIME<BR>\n" );
document.write( "D UP STREAM=(R-5)20<BR>\n" );
document.write( "D DOWN STREAM=(R+5)15.<BR>\n" );
document.write( "SEEING AS THE DISTANCE IS THE SAME WE SET THESE TWO EQUATION EQUAL & WE HAVE:<BR>\n" );
document.write( "(R-5)20=(R+5)15<BR>\n" );
document.write( "20R-100=15R+75<BR>\n" );
document.write( "20R-15R=75+100<BR>\n" );
document.write( "5R=175<BR>\n" );
document.write( "R=175/5<BR>\n" );
document.write( "R=35 KM IS THE BOAT SPEED. <BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "(35-5)20=(35+5)15<BR>\n" );
document.write( "30*20=40*15<BR>\n" );
document.write( "600=600<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );