Carpet

The room has rectangle shape with dimensions 5 m × 2.1 m. How many meters of carpet a width of 2 need to buy to cover the entire room?

Correct answer:

l =  5.3 m

Step-by-step explanation:

$$\begin{gathered} a=5\text{ m } \\ b=2.1\text{ m } \\ s=2\text{ m } \\ S=a\cdot b=5\cdot 2.1={\displaystyle \frac{21}{2}}=10.5{\text{m}}^2 \\ l=S\mathrm{/}s=10.5\mathrm{/}2={\displaystyle \frac{21}{4}}={\displaystyle \frac{21}{4}}\text{ m}=5.3\text{ m} \end{gathered}$$

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