JAMB Mathematics 2016 Objective — Question 18

Question 18 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2016 Objective paper, with the correct answer and a full explanation.

18. Calculate the perimeter of a sector of a circle of radius 12cm and angle 60°. A. (12+4π)cm B. (24+4π)cm C. (12+6π)cm D. (24+6π)cm

A. (12+4π)cm
B. (24+4π)cmCorrect
C. (12+6π)cm
D. (24+6π)cm

Explanation

Perimeter of a sector = (θ/360)×2πr + 2r = (60/360)×2π×12 + 2(12) = 4π+24 = (24+4π)cm.

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