A path of width \( 3.5 \mathrm{~m} \) runs around a semi-circular grassy plot whose perimeter is...

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A path of width \( 3.5 \mathrm{~m} \) runs around a semi-circular grassy plot whose perimeter is
\( P \) \( 72 \mathrm{~m} \). Find the area of the path. (Use \( \pi=22 / 7 \) )
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