Seven workers

Seven workers clear the glade in 22 hours. How many workers would need to be done in 8 hours?

Correct answer:

n =  20

Step-by-step explanation:

$$\begin{gathered} n_1=7\cdot 22\mathrm{/}8={\displaystyle \frac{77}{4}}=19\frac{1}{4}=19.25 \\ n=\lceil n_1\rceil =\lceil 19.25\rceil =20 \end{gathered}$$

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