Semicircles 7365

The playground floor plan consists of a square with a side of 8 meters and two semicircles. Calculate the length of the mantel, which is around the perimeter of the field.

Correct answer:

x =  41.1327 m

Step-by-step explanation:

$$\begin{gathered} a=8\text{m} \\ r=a/2=8/2=4\text{m} \\ x=2\cdot a+2\pi \cdot r=2\cdot 8+2\cdot 3.1416\cdot 4=41.1327\text{m} \end{gathered}$$

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