Question 24
Mensuration of Plane ShapesA circle is divided into two sectors in the ratio 3:7. If the radius of the circle is 7 cm, calculate the length of the minor arc of the circle.
- A.18.85 cm
- B.13.20 cm
- C.12.30 cm
- D.11.30 cm
Show the answer and explanation
Answer: B (13.20 cm)
Explanation
The minor sector has 3/10 of 360° = 108°. Arc = 108/360 × 2 × 22/7 × 7 = 13.20 cm.