Civil Service Exam Reviewer · Measurement and Geometry · hard
A window is shaped like a 15 dm × 15 dm rectangle topped by a semicircle whose diameter is the 15-dm side. What is the window's total area? (π = 3.14)
- 401.63 dm²
- 313.31 dm²
- 578.25 dm²
- 225 dm²
Answer
B. 313.31 dm²
Solution
Rectangle = 225; semicircle = ½ × 3.14 × 7.5² = 88.31. Total = 313.31 dm².
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