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If the length of a rectangle is increased by 25% and the width is decreased by 20%, then the area of the rectangle :
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- increases by 5%
- decreases by 5%
- remains unchanged
- increases by 10%
- increases by 5%
Correct Option: C
Using Rule 10,
According to question,
Area of original rectangle = xy
Area of new rectangle = 1.25x × 0.80y = xy
| ∴ Effective change = |  | 25 - 20 - |  | % = 0% | |
| 100 |
i.e. Hence, the area of the rectangle remains unchanged.
