1 Answer

Jochen · Answer 1 · 2023-10-11T07:40:24+0000

Step-by-step explanation

From the question we can see that the radii of the circles is given as

$\begin{gathered} r_(big)=11metres \\ r_(small)=9metres \end{gathered}$

Therefore, we will then find the area of the big circle and the small circle.

$\begin{gathered} Area_(big)=\pi r_(big)^2=3.14*11^2=379.94m^2 \\ Area_(small)=\pi r_(small)^2=3.14*9^2=254.34m^2 \end{gathered}$

Therefore, the area of the sidewalk is the difference between the area of the big circle and the area of the small circle.

$Area\text{ of side walk = }Area_(big)-Area_(small)=379.94-254.34=125.6m^2$

Answer: 125.6 square meteres

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