Question 1125787
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A Foreman needs 14 workers to complete a certain task in 16 days.
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r, the rate of one worker
1, one whole job
n, additional workers


{{{14r*16=1}}}


{{{highlight_green(r=1/(14*16))}}}



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However,
after 8 days, 
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Amount of job not yet completed
Half of the job;

{{{1/2}}}



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 the engineer instructed him to complete the task in following 4 days.  How many additional workers does the foreman
need to request for?
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{{{highlight_green((14+n)r*4=1/2)}}}

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{{{14+n=(1/2)(1/4)(1/r)}}}

{{{n=(1/8)(1/r)-14}}}

{{{n=(1/8)(14*16)-14}}}

{{{n=14*2-14}}}

{{{highlight(n=14)}}}