Answer
Time taken to complete a work is inversely proportional to number of workers employed.
Work Step by Step
Two variables that are inversely related
1) Time taken to complete a work = $\frac{1}{number\ of\ workers\ employed}$
More worker working, lesser time to complete the work
2)To cover a fixed distance d
time taken = $\frac{d}{speed}$
Higher the speed less time taken.
