ECZ 2016 · O-Level Paper 1 — Mensuration
MN is an arc of a circle with centre O and radius 21 cm. Given that ∠MON = 120°, calculate the area of sector MON. [π = 22⁄7]
- A. 462 cm²
- B. 231 cm²
- C. 1386 cm²
- D. 154 cm²
Verified working — step 1
Area = θ⁄360 × πr² = 120⁄360 × 22⁄7 × 21² = 1⁄3 × 1386 = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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