The length of the rectangle was increased by 10% and the width by 20%. by how many% the area of the rectangle has increased.
| March 2, 2021 | education
To solve this problem, we introduce two conditional variables “X” and “Y”, through which we denote the initial length and width of the rectangle, respectively.
Then, the area of the new rectangle will be equal to 1.1X x 1.2Y = 1.32XY.
This means that the area of the new rectangle has increased by (1.32XY – XY) / XY) x 100% = 0.32 x 100% = 32%.
Answer: the area of the new rectangle has increased by 32%.
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