Answer:
2 people
Step-by-step explanation:
The one-person rate is 12 hours to do the job.
You can express this as 1%2F12 jobs per hour, the one-person rate.
Finding the rate of work each men can do can help. The number of men needed to paint the room in 4 hours in given case is 18
More people to do a task means less time it will take.
Less people to do a task means more time it will take.
Thus, they are inversely related.
If x men take y time for a work,
Let we define:
For given situation,
8 men take 9 hours for a work
It means,
Manpower needed for completing the given work = [tex]9 \times 8 = 72[/tex] units.
Suppose that it takes [tex]x[/tex] men to complete that same work in 4 hours.
The manpower needed by work = [tex]4 \times x[/tex]
As the manpower needed for completing the work is same, thus,
[tex]72 = 4 \times x\\\\x = \dfrac{72}{4} = 18[/tex]
Thus, The number of men needed to paint the room in 4 hours in given case is 18
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