ECZ 2018 · O-Level Paper 1 — Mensuration

In the diagram below, OPQ is a sector of a circle whose centre is O, radius x cm and angle POQ = 80°. Given that the area of the sector OPQ is 308 cm2, calculate the value of x. [π = 227]

Diagram for ECZ 2018 · O-Level Paper 1
  • A. 49cm
  • B. 21cm
  • C. 14cm
  • D. 441cm

Verified working — step 1

Area = (θ/360°) × πx2

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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