Civil Service Exam Reviewer · Measurement and Geometry · hard
A window is shaped like a 12 dm × 4 dm rectangle topped by a semicircle whose diameter is the 4-dm side. What is the window's total area? (π = 3.14)
- 60.56 dm²
- 73.12 dm²
- 48 dm²
- 54.28 dm²
Answer
D. 54.28 dm²
Solution
Rectangle = 48; semicircle = ½ × 3.14 × 2² = 6.28. Total = 54.28 dm².
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