If 10 workers complete a piece of work in 6 days by working 8 hours per day, how many workers are required to finish the work in 8 days by working 6 hours per day?

Explanation

Total work:

10 × 6 × 8 = 480

New condition per worker:

8 × 6 = 48 hours

Thus,

480 / 48 = 10

So 10 workers are still required. The longer number of days exactly compensates for the shorter working day.