The side of a square is increased by 25%. What is the percentage increase in its area?
Answer & explanation
Correct answer: option 4
25% = \(\frac{1}{4}\)
Side Old : New
4 : 5
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Area 16 : 25
Area of square = Side2
Percentage change in area = \(\frac{25 - 16 }{16}\) × 100
= \(\frac{25 - 16 }{16}\) × 100
= 56.25%