2019 · Q50
The length and breadth of a rectangle are increased by 20% and 10% respectively. What is the percentage increase in the area of the rectangle?
Elementary MathematicsPercentages
- A32%
- B30%
- C25%
- D15%
Explanation
The new area is (1.20 × 1.10) = 1.32 times the original, an increase of 32%. The trap answer 30% just adds the two percentages, ignoring compounding. The answer is (A) 32%.