The given equation is C=41, where C is the number of chairs, and 1 is the number of workers that are making chairs.
For simplicity, denote the number of workers by n.
So, replace 1 by n in the equation, we have
C=4n
[tex]\Rightarrow \frac {C}{n}=4[/tex]
Note that C/n is the number of chairs made by one worker, which is the unit rate.
Hence the required unit rate is 4.