Civil Service Exam Reviewer · Percentage · hard
The length of a rectangle is increased by 40% and its width is decreased by 50%. What is the percent change in its area?
- 10% decrease
- 30% decrease
- 30% increase
- 35% decrease
Answer
B. 30% decrease
Solution
New area factor = 1.4 × 0.5 = 0.7 → 30% decrease.
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