Arithmetic Ability
Area

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Q.

If each side of a square is increased by 25%, find the percentage change in its area.

View Answer

Correct choice: A

Explanation:

Let each side of the square be a. Then, area = .a2 New side =125a/100=5a/4. New area = (5a/4)2= (25a2/16) Increase in area = 25a2/16−a2=9a2/16 Increase% = [9a2/16*1/a2*100] % = 56.25%.
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