document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=18599>Question 18599</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Need help with this, The inlet pipe of an oil tank can fill the tank in 1 hour, 30 minutes. The outlet pipe can empty the tank in 1 hour. How long does it take to empty the tank if both pipes are open? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #9051 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=9051\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The inlet pipe of an oil tank can fill the tank in 1 hour, 30 minutes. The outlet pipe can empty the tank in 1 hour. How long does it take to empty the tank if both pipes are open?<BR>\n" );
document.write( "inlet pipe fills 1 tank in 1hr 30 mts =1.5=3/2 hrs.<BR>\n" );
document.write( "or inlet pipe fills ...1/(3/2)=2/3 tank in 1 hr.<BR>\n" );
document.write( "out let pipe empties 1 tank in 1 hr.<BR>\n" );
document.write( "...so assuming the tank is full at the start water to be emptied =1 tank\r<BR>\n" );
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document.write( "and in 1 hr inlet fills 2/3 tank and out let empties 1 tank ..so net out flow is 1-2/3=(3-2)/3=1/3 tank in 1 hour.<BR>\n" );
document.write( "so 1/3 tank emptying needs .....1 hr<BR>\n" );
document.write( "then 1 tank emptying needs ......? hrs...= 1*1/(1/3)=3 hrs. </SPAN>\n" );
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