document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=489454>Question 489454</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help with this word problem I am having trouble understanding where to start translating numbers into ratios \r<BR>\n" );
document.write( "\n" );
document.write( "1 pipe can fill a large tank in 5 hours and a smaller pipe can fill the same tank in 3 hours.  How long will it take both pipes to fill the tank if they are turned on at the same time?\r<BR>\n" );
document.write( "\n" );
document.write( "60 x 5 = 300 mins<BR>\n" );
document.write( "60 x 3 = 180 mins\r<BR>\n" );
document.write( "\n" );
document.write( "300 - 180 = 120 \r<BR>\n" );
document.write( "\n" );
document.write( "120/60 = 2\r<BR>\n" );
document.write( "\n" );
document.write( "take 2 hours to fill \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #333669 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=333669\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1 pipe can fill a large tank in 5 hours and a smaller pipe can fill the same tank in 3 hours. How long will it take both pipes to fill the tank if they are turned on at the same time? <BR>\n" );
document.write( "--<BR>\n" );
document.write( "1st pipe rate = 1/5 job/hr<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Smaller pipe rate = 1/3 job/hr<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Together pipe rate = 1/x job/hr<BR>\n" );
document.write( "=====================================<BR>\n" );
document.write( "Equation:<BR>\n" );
document.write( "rate + rate = together rate<BR>\n" );
document.write( "1/5 + 1/3 = 1/x<BR>\n" );
document.write( "5x + 3x = 15<BR>\n" );
document.write( "8x = 15<BR>\n" );
document.write( "x = 15/8 hrs = 1 hr 52.5 minutes) (time to do the job together)<BR>\n" );
document.write( "================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );