JAMB Mathematics 2016 Objective — Question 24
Question 24 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2016 Objective paper, with the correct answer and a full explanation.
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24. Calculate the perimeter of a sector of a circle of radius 9cm and angle 36°. A. 18cm B. (18+9π/5)cm C. (9+9π/5)cm D. 9π/5 cm
- A. 18cm
- B. (18+9π/5)cmCorrect
- C. (9+9π/5)cm
- D. 9π/5 cm
Explanation
Perimeter of a sector = (θ/360)×2πr + 2r = (36/360)×2π×9 + 18 = (9π/5)+18cm.
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