document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=470869>Question 470869</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how long will a tank to be filled with water when three taps are opened at the same time?(one is used as a discharge) the two bringing in water take 6min and 4min respectively.the outlet takes 9 min. </SPAN>\n" );
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document.write( "portion of tank will fill in one minute = 1/6 + 1/4 - 1/9 = 11/36\r<BR>\n" );
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document.write( "so, it will take 36/11 minutes to fill the tank completely. \r<BR>\n" );
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