Question 762535
What is the rate for ONE man to do the job?  How many days for 1 man?


One man needs 4 times longer than 4 men.
{{{14*4=56}}} days for 1 man to do the job, so rate is {{{1/56}}} jobs per day.


Seven men?  The rate of each man in the group may be assumed additive for the rate of the group of 7 men.
Seven men rate of work is {{{7(1/56)=1/8}}} jobs per day, or as the reciprocal, 8 days to do the job.