Floor

The floor area of ​​the room is 31 m² and has a width of 4.3 m. How many centimeters of circumference measured the floor on the map at the scale 1:75?

Correct answer:

o =  30.7 cm

Step-by-step explanation:

$$\begin{gathered} o=2(a+b)\cdot {\displaystyle \frac{100}{75}}=2(a+{\displaystyle \frac{S}{a}})\cdot {\displaystyle \frac{100}{75}}= \\ o=(4.3+{\displaystyle \frac{31}{4.3}})\cdot {\displaystyle \frac{200}{75}}=30.7\text{ cm} \end{gathered}$$

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