Deadline

Five equally skilled masons built half the wall in 14 days. In order to meet the planned deadline, the remaining part must be built in 6 days. How many more masons need to be allocated for construction?

Correct answer:

n =  7

Step-by-step explanation:

$$\begin{gathered} 5\cdot 14=(5+x)\cdot 6 \\ 6x=40 \\ x={\displaystyle \frac{20}{3}}\doteq 6.666667 \\ n=\lceil x\rceil =\lceil 6.6667\rceil =7 \end{gathered}$$

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