Question 25
Mensuration of Plane ShapesThe angle of a sector of a circle of radius 35cm is 288°. Find the perimeter of the sector [Take π = 22/7]
- A.246cm
- B.211cm
- C.141cm
- D.114cm
- E.44cm
Show the answer and explanation
Answer: A (246cm)
Explanation
Arc = 288/360 × 2 × 22/7 × 35 = 0.8 × 220 = 176 cm. Perimeter = arc + two radii = 176 + 70 = 246 cm.