The rug

Josie has a rug with the area of 18 square feet. She will put the rug on the floor that is covered in 1/3 square foot tiles. How many tiles will the rug cover?

Correct answer:

n =  162

Step-by-step explanation:

$$\begin{gathered} S=18{\text{ft}}^2 \\ a={\displaystyle \frac{1}{3}}\doteq 0.3333\text{ ft } \\ {S}_1=a^2=0.3333^2={\displaystyle \frac{1}{9}}\doteq 0.1111{\text{ft}}^2 \\ n=S\mathrm{/}{S}_1=18\mathrm{/}0.1111=162 \end{gathered}$$

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