document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1099899>Question 1099899</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A water tank can be filled by three pipes separately in 20,30 and 6o minutes respectively.In how many minutes can it be filled by the three pipes acting together?<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 #714399 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13330)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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/cgi-bin/show-face.mpl?user=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=714399\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br>Here is an alternative method of solution for this kind of problem which avoids working with fractions....<br><BR>\n" );
document.write( "Consider the 60 minutes it takes the third pipe to fill the tank.<br><BR>\n" );
document.write( "The first pipe could fill 3 of the tanks in those same 60 minutes.<BR>\n" );
document.write( "The second pipe could fill 2 of the tanks in the 60 minutes.<br><BR>\n" );
document.write( "So all working together, the three pipes could fill 1+3+2 = 6 tanks in 60 minutes.<br><BR>\n" );
document.write( "And that means they could fill the one tank in 10 minutes. </SPAN>\n" );
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