Question 347863
Originally, the job required {{{15*16=240}}} worker-days to complete.
They put in {{{15*8=120}}} worker-days in 8 days.
The reduced crew of {{{11}}} put in {{{11*4=44}}} worker-days in 4 days.
Look at the worker-days remaining.
{{{W*D+44+120=240}}}
{{{W*D+164=240}}}
{{{W*D=76}}}
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.
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76 worker-days of output are required to finish the job.
He has used up {{{8+4=12}}} days aleready and he has 4 days if he wants to stick to the 16 day schedule.
{{{W*4=76}}}
{{{W=19}}}
He needs to have {{{19}}} workers to make his schedule.
Since he's already hired {{{11}}} workers, he should hire an additional {{{highlight(8)}}} workers.