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if the side of a square be increased by 4 cms. The area increased by 60 sq. cms . The side of the square is?

Correct Answer: None of these

Explanation:

Let each side = x cm
Then, (x + 4 )2 - x2 = 60
⇒ x 2 + 8x + 16 - x2 = 60
∴ x = 5.5 cm


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