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Sticky Note
Area of rectangle one side increased by 20%, other side is increased by? (Area unchanged)
  1. 25% decrease
  2. 20% decrease
  3. 16.67% decrease
  4. None of these
Explanation

Area = length x width

One side increased 20% means new side = 1.2 x old side

To keep area same, other side must be 1 / 1.2 = 0.8333 of old side

0.8333 = 83.33%

Decrease = 100% - 83.33% = 16.67%


Last verified on 17-06-2026

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