Given that the perimeter of the square is 48 cm.
We need to determine the length of one side of the square.
Length of the square:
The length of one side of the square can be determined using the perimeter formula.
The formula is given by,
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Substituting
in the above formula, we get;
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Dividing both sides of the equation by 4, we have;

Thus, the value of a is 12 cm.
Hence, the length of the one side of the square is 12 cm.