NECO Mathematics 2022 Objective — Question 22
Question 22 of 50 from the National Examinations Council (NECO) Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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Using the information in Q21, find the area of the sector OPSQ (the major sector).
- A. 15.40cm^2
- B. 17.64cm^2
- C. 23.10cm^2
- D. 32.34cm^2Correct
Explanation
The minor sector OPRQ subtends 150 degrees, so major sector OPSQ subtends 360-150=210 degrees. Area = (210/360) x (22/7) x 4.2^2 = 32.34cm^2.
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