Answer:
The plant employs a workforce of 120 laborers.
Explanation:
The provided data indicates an annual production of 57,600 water heaters.
The monthly output translates to 57,600 divided by 12 months, resulting in 4,800 water heaters monthly.
Every laborer contributes 160 hours of work each month.
Let’s suppose there are x laborers; thus, they will collectively work 160x hours in a month. Hence, labor input totals 160x monthly.
Labor productivity is assessed at 0.25.
This productivity metric can be defined as Output divided by Labor input.
0.25 = 4,800 / 160x.
Rearranging gives 25/100 = 4,800 / 160x.
160x = (4800 X 100) / 25.
160x = 19200.
Solving for x yields x = 19200/160.
x results in 120.
Thus, the number of laborers at the plant is 120 laborers.