Answer:

To get the total walking area available to pedestrians visiting the park, we need to do the following:

Get the area of circular fountain (with a 5-m radius)

Get the area of circular park (with a 70-m radius)

Get the difference between the area of the circular park and the area of the circular fountain.

We need to get the difference of the areas because the area of the circular fountain cannot be used as a walking area. Finding the difference means we are subtracting the area not used for walking from the total area of the park. Since both the fountain and the park is a circle, we will use the formula of getting the area of a circle. To get the area of a circle, we will use the formula, A = \pi r^{2}A=πr

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where r represents the radius of a perfect circle. This is also explained in: brainly.ph/question/105449 and brainly.ph/question/110314. For the solution:

Area of the circular fountain:

\begin{gathered}r = 5\\\\A = \pi r^{2} \\A = 5^{2} \pi \\A = 25\pi \\A = 78.5398163397 m^{2}\end{gathered}

r=5

A=πr

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A=5

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π

A=25π

A=78.5398163397m

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Area of the circular park:

\begin{gathered}r = 70 m\\\\A = \pi r^{2} \\A = 70^{2} \pi \\A = 4900 \pi \\A = 15393.8040026 m^{2}\end{gathered}

r=70m

A=πr

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A=70

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π

A=4900π

A=15393.8040026 m

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Difference of areas:

Difference = 15393.8040026 - 78.539816339715393.8040026−78.5398163397

Difference = 15315.2641863 m^{2}15315.2641863 m

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= 15315.26 m^{2}15315.26m

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Answer:

The total walking area available to pedestrians visiting the park is 15, 315.26 m². Note that we used the not rounded exact values of areas to get the correct and exact difference