Forestry workers

In the forest is employed 56 laborers planting trees in nurseries. For 8 hour work day would end job in 37 days. After 16 days, 9 laborers go forth?

How many days is needed to complete planting trees in nurseries by others, if they will work 10 hours a day?


x =  20 d


56 * 8 * 37 = 16 * 8 * 56 + (56 - 9) * 10 * x

470x = 9408

x = 4704235 ≈ 20.017021

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