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1. If the langth of a rectangle is increased by 20% and width is decreased by 20% what is the change in area of rectangle ?
- A. unchanged
- B. unchanged
- C. unchanged
- D. unchanged
Answer: Option D
Explanation:
Let's assume the length of the rectangle is L and the width is W.
Then the original area of the rectangle = L x W
After the increase in length by 20%, the new length = L + 0.2L = 1.2L
After the decrease in width by 20%, the new width = W - 0.2W = 0.8W
So, the new area of the rectangle = (1.2L) x (0.8W) = 0.96LW
Therefore, the new area of the rectangle is 96% of the original area.
Answer: 96% of the original area.
decreased by 4%
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