Answer:
B) 10 units
Explanation:
Area of a square is A = s², and perimeter of a square is P = 4s.
A = P + 60
s² = 4s + 60
s² − 4s − 60 = 0
(s + 6) (s − 10) = 0
s = -6 or 10
Since s can't be negative, s = 10 units.
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