Question
If the length of a rectangle is increased by 30% and its
breadth is decreased by 20%, then the area of the rectangle will be increased or decreased by how much percent?Solution
According to the question Percentage change in Area = x – y – xy/100 = 30 – 20 – 30 × 20/100 = 10 – 6 = 4% The area of the rectangle will be increased by 4%.
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