ECZ 2017 · O-Level Paper 1 — Mensuration
The diagram below is a sector with centre O and radius 7cm. Angle at O is 270°. Calculate the area of the sector. [π = 227]
- A. 38.5 cm2
- B. 154 cm2
- C. 115.5 cm2
- D. 231 cm2
Verified working — step 1
A sector with a 270° centre angle is 270360 = three quarters 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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