UPTET Feb 2016,p1; Q119

119If the perimeter of a square is (4a + 8) unit, then its area will be

Option : D
Explanation : Let the length of square be x unit.
Then, 4x = 4a + 8,
4x = 4 (a + 2).
⇒ x = a + 2
∴ Area of square = x²
= (a + 2)² = (a² + 4a + 4)sq unit.

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