document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=60884>Question 60884</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/020118642X/algebrahomeworkh>Mathematics 11</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A survey crew took a trip up the river and back in 10 h. Going upstream they paddled at 4 km/h, but downstream they travelled at 12 km/h. How far upstream did the crew go? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #41845 by </B><A HREF=/tutors/aboutme.mpl?userid=uma><B>uma(370)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=uma><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=41845\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the distance travelled upstream = x km<BR>\n" );
document.write( "Speed while going upstream = 4 km/h\r<BR>\n" );
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document.write( "So time taken = distance/speed<BR>\n" );
document.write( "              = (x/4)h\r<BR>\n" );
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document.write( "Speed while travelling downstream = 12 km/h\r<BR>\n" );
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document.write( "So time taken = distance/speed<BR>\n" );
document.write( "              = (x/12)h [distance upstream =  distance downstream]\r<BR>\n" );
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document.write( "Total time taken = 12 h\r<BR>\n" );
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document.write( "==> x/4 +  x/12 = 4\r<BR>\n" );
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document.write( "The LCD for the left side = 12<BR>\n" );
document.write( "==> (3x + x)/12 = 4<BR>\n" );
document.write( "==> 4x/12 = 4<BR>\n" );
document.write( "multiplying both the sides by 12 we get..<BR>\n" );
document.write( "==> 4x = 48<BR>\n" );
document.write( "==> 4x/4 = 48/4<BR>\n" );
document.write( "==> x = 12\r<BR>\n" );
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document.write( "So the distance upstream = 12 km\r<BR>\n" );
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document.write( "Good Luck!!!\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );