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If the side of a square is increased by 30%, its area is increased by?

9%
30%
60%
69%

Correct Answer: 69%

Explanation:

Let side of square = 100 cm
Area = (100 x 100)cm² = 10000 cm²
New area = (130 x 130)cm² = 16900 cm²
Increase in area = (6900 / 10000) x 100% = 69%

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