8 workers with the same productivity complete the work in 4.5 hours. How long will it take 6 workers to do this work?

Option number 1.

Let’s calculate what part of the eight workers are six workers:

6: 8 = 0.75.

Let’s calculate how many hours it will take six workers to complete the task, which before that were completed by eight:

4.5: 0.75 = 6.

Option number 2.

Let’s calculate how many hours it will take to complete the specified amount of work for one person:

4.5 * 8 = 36.

Let’s calculate how many hours it will take six people to complete the specified amount of work:

36: 6 = 6.

Answer: Six people will need 6 hours.