Question

how many workers will.be needed to complete a task in 9 days given that it takes 12 days for 3 workers to complete the same task

Answer 1

The task can be finished in 12 days for 3 workers. For this condition that the work can be done by 3 workers in 12 days, we have

`task=12days*3workers=36\text{ worker-days}`

If we have 9 working day to complete the task, we will be needing

`\frac{36\text{ worker days}}{9\text{ days}}=4\text{ workers}`

It takes 4 workers to finish the same task in 9 days.