The territory of the reserve, which has a square shape, must be surrounded by a 256 km long fence.

The territory of the reserve, which has a square shape, must be surrounded by a 256 km long fence. What’s the side of the hedge?

It is clear from the problem statement that the length of the fence is the perimeter of the reserve, which has a square shape. Since the length of the fence is known, we can calculate the length of one of its sides by dividing the length of the entire fence by 4, then we get:
256/4 = 64 km.
Answer: one side of the fence is 64 km.



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