JAMB Mathematics 2016 Objective — Question 29

Question 29 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2016 Objective paper, with the correct answer and a full explanation.

29. Length of an (l) arc = θ/360 × 2πr. Then, l = (30°/360°) × 2π×12 = (1/12)×2π×12 = 2πcm. Calculate.

A. 2πcm
B. 2πcm
C. 2πcm
D. 2πcm

Explanation

Length of an (l) arc = θ/360 × 2πr. Then, l = 30°/360° × 2π × 12 = 1/12 × 2π × 12 = 2πcm.

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