document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=72168>Question 72168</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My instructor made this question up. But we use the Second Edition, Intermediate Algebra testbook, by Bittinger, ellenbogen, Johnson and chapter 6 - sorry if you have answered a question like this already? I saw some similar but not with the \"skill water\"...<BR>\n" );
document.write( "question is.<BR>\n" );
document.write( "A boat travels 10 miles per hour in still water. It travels 20 miles down a river in the same time that it travels 5 miles up the same river. What is the speed of the River? \r<BR>\n" );
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document.write( "thank you.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #51573 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=51573\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 20/(10+X)=5/(10-X) CROSS MULTIPLY<BR>\n" );
document.write( "5(10+X)=20(10-X)<BR>\n" );
document.write( "50+5X=200-20X<BR>\n" );
document.write( "5X+20X=200-50<BR>\n" );
document.write( "25X=150<BR>\n" );
document.write( "X=150/25<BR>\n" );
document.write( "X=6 MPH FOR THE CURRENT<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "20/16=5/4<BR>\n" );
document.write( "1.25=1.25<BR>\n" );
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document.write( "NEW PROBLEM: THESE ARE THE VERY EASY ONES <BR>\n" );
document.write( "X*Y/(X+Y)=TOTAL TIME WHERE X & Y ARE THE TIMES IT TAKES EACH ONE INDICVIDUALLY TO DO SOMETHING OR WVWN PIPES TO FILL/EMPTY A POOL.<BR>\n" );
document.write( "IN YOU PROBLEM WE HAVE A 40 MINTE JOB & AN UNKNOWN JOB TIME THAT ENDS UP BEING A 15 MINUTE JOB IF COMBINED. THUS LET X BE THE UNKNOW TIME.<BR>\n" );
document.write( "40X/(40+X)=15 NOW CROSS MULTIPLY<BR>\n" );
document.write( "40X=15(40+X)   <BR>\n" );
document.write( "40X=600+15X<BR>\n" );
document.write( "40X-15X=600<BR>\n" );
document.write( "25X=600 X=600/25<BR>\n" );
document.write( "X=24 MINUTES FOR THE OTHER PERSON TO DO THE JOB ALONE.<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "40*24/(40+24)=15<BR>\n" );
document.write( "960/64=15<BR>\n" );
document.write( "15=15<BR>\n" );
document.write( "HAPPY MATHING\r<BR>\n" );
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