ECZ 2017 · O-Level Paper 1 — Mensuration
A sector of a circle has radius 7 cm and an angle of 270° at the centre. Calculate its area. [π = 227]
- A. 38.5 cm²
- B. 154 cm²
- C. 115.5 cm²
- D. 231 cm²
Verified working — step 1
Sector area = (θ/360) × πr² = (270360) × (227) × 7² = ¾ × 154 = …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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