Question 27
Mensuration of Plane ShapesIn the diagram above, |QR| is the diameter of the semicircle QR. Find the area of the figure to the nearest whole number. [π = 22/7]
- A.89cm2
- B.70cm2
- C.90cm2
- D.80cm2
Show the answer and explanation
Answer: A (89cm2)
Explanation
Rectangle = 10 × 7 = 70cm2. Semicircle with radius 3.5cm = ½ × 22/7 × 3.52 = 19.25cm2. Total ≈ 89cm2.