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Mathematics, 30.04.2021 20:10 lberries08

The fountain at the park has a walkway around it that is 1 foot wide. The fountain has a radius of 8 feet. The radius of the fountain and walkway together is 9
The area in terms of pi of the fountain and the walkway together is 81Ο€ ft2.
The approximate value for the area of just the walkway to the nearest whole number is 53

I need an explanation on how the walkway is 53
and no links

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