Answer:
100x70 = 7000 m²
Explanation:
The more the shape deviates from a square, the smaller the area will be. The area can be reduced by making the park longer and narrower. The sum of length and width must remain the same for the perimeter to be unchanged.
Given park: 90 m × 60 m = 5400 m²
100x70 = 7000 m²