Find the area of a square park whose perimeter is 320 m.
It is given in the question that,
Perimeter of square park = 320 m
We know that,
Perimeter of square park = 4 × Length of the side of park
320 = 4 × Length of the side of the park
∴ Length of side of park = 
= 80 m
We also know that,
Area of square = (Side)2
= (80)2
= 6400 m2
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