<PRE><B>Question 410864</B>
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Hi
2 open pipes fill a tank together in 6min. one pipe alone fills a tank in 9min.
 find time for second pipe alone.
Let x represent the time for second pipe alone
Question states*** per min the Equalizer
   1/9 + 1/x = 1/6
Solving for x by mulitplying thru with 54x, so as all denominators= 1
   6x + 54 = 9x
       54 = 3x
        x = 18min, the time for second pipe alone
CHECKING our Answer***
 2/18 + 1/18 = 3/18 = 1/6</PRE>