Multiple choice

If the side of the square decreases by 10% then how much percent the area of the square will decrease ?

  1. 19%

  2. 20%

  3. 25%

  4. 30%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a side decreases by 10%, the new side is 0.9 times original. Area scales with the square of side length: (0.9)^2 = 0.81, meaning the area becomes 81% of original. Thus, the decrease is 100% - 81% = 19%.

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