Bathroom 2

A bathroom is 2.4 meters long and 1.8 meters wide. How many square tiles 1 dm on each side are to be used to cover it?

Correct answer:

n =  432

Step-by-step explanation:

$$\begin{gathered} a=2.4\cdot 10=24\text{ dm } \\ b=1.8\cdot 10=18\text{ dm } \\ {S}_1=1\cdot 1=1{\text{dm}}^2 \\ {S}_2=a\cdot b=24\cdot 18=432{\text{dm}}^2 \\ n=S_2\mathrm{/}{S}_1=432\mathrm{/}1=432 \end{gathered}$$

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