Question 1037369
<pre>
                        RATE

BIG PIPE               {{{1/(2&2/3)1/(8/3)=3/8}}}

SMALL PIPE                {{{1/s}}}
</pre>

Work was done in two time periods:  three hour only big pipe, two-thirds hour both pipes.


{{{(3/8)*3+(3/8+1/s)(2/3)=1}}}-----------the "1" counting the ONE ENTIRE tank volume.   Solve for s, the time for the small pipe alone to fill the one tank.