Discuss Forum
1. If a rectangle's length and width are both doubled, by what percent is the rectangle's area increased?
- A. 50%
- B. 50%
- C. 50%
- D. 50%
Answer: Option D
Explanation:
Let the initial length and width be L and W respectively.
Initial area = L×W
New length = 2L
New width = 2W
New area = 2L×2W = 4 L×W
Increase in area = (4 L×W - L×W) / (L×W) × 100% = 300%
Post your comments here: