Question

The number of days, d, required to complete a job varies inversely as the number of workers, w, on the job.

If it takes 9 days for 8 workers to complete a job, then how many workers would it take to do the job in 18 days?

Answer 1

It would take 18 days for 4 workers to complete the job.

Explanation:

As d goes up, w goes down by the same amount.

X = 9*8 = 72

18*4 = 72

likewise, 2*36 = 72

3*24 = 72

6*12 = 72

And so on....