Question 955333
Rate x Time= Output
{{{(12R)*18=100}}}
So the rate for one worker is,
{{{R=100/(12*18)=25/54}}}
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For 12 workers working 4 days, their output is,
{{{(4/18)(100)=200/9}}}
The amount needed to complete the job is,
{{{100-200/9=900/9-200/9=700/9}}}
Now there are only 8 workers so,
{{{8(25/54)*T=700/9}}}
{{{T=(700/9)(54/24)(1/8)}}}
{{{T=21}}} {{{days}}}