ICE Special Agent Exam Prep

Category - Math - Hard

If width of a rectangle is increased by 10% and the length is decreased by 20%, by what percent does the area decrease?
  1. 2%
  2. 12%
  3. 16%
  4. 20%
  5. 21%
Explanation
Answer B: Original area = a x b Revised area = 1.1a x 0.8b = 0.88ab
Decrease in area = 0.12 = 12%

Key takeaway: The word problems based on basic geometry are easy to tackle if you remember simple formulae ( perimeter, area ) of rectangle, square, circle etc. and their applications.
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