Verified Answer :

JcAlmighty

The answer is 4√7.

Area (A) of a square can be expressed as the square of its side (a):
A  = a²

It is given:
A = 112 ft² = a²
⇒ a² = 112 ft²
⇒ a = √112 = √(167) = √16  √7 = √(4²)  √7 = 4  √7 = 4√7

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