ECZ 2016 · O-Level Paper 1 — Mensuration
In the diagram below, MN is an arc of a circle whose centre is O and radius 21 cm. Given that ∠MON = 120°, calculate the area of the sector MON. [Take π to be 22⁄7]
- A. 462 cm2
- B. 231 cm2
- C. 1386 cm2
- D. 154 cm2
Verified working — step 1
A sector with a 120° centre angle is 120360 = one THIRD of the full circle.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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