9514 1404 393
Answer:
316 m²
Explanation:
The centerline length of the walkway is 2×(52 m +27 m) = 158 m.
The area is the product of the walkway's centerline length and its width:
A = (158 m)(2 m) = 316 m²
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More detail on this approach
The centerlines of the long-side walkways are 25 m + 1 m + 1 m = 27 m apart. The centerlines of the short-side walkways are 50 m + 1 m + 1 m = 52 m apart.
The total length of the centerline is the perimeter of a 27 m by 52 m rectangle:
P = 2(L+W) = 2(52 m +27 m) = 158 m
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Usual approach
The area with the walkways is 54 m by 29 m = 1566 m². The area without the walkways is 50 m by 25 m = 1250 m². The difference is the area of the walkway, 1566 -1250 = 316 square meters.