2018
Mathematics
JAMB
An arc of a circle of radius 14cm subtends angle 300° at the centre. Find the perimeter of the sector formed by the arc (take π = 22/7)
A.
14.67 cm
B.
73.33 cm
C.
101.33 cm
D.
513.33 cm
Correct Answer: 101.33 cm
Explanation
Length of the arc = θ/360 × 2πr = 300/360 × 2 × 22/7 × 14 = 220/3 = 73.33 cm Perimeter of the sector = Length of the arc + 2r = 73.33 + 2(14) = 101.33 cm
Length of the arc = θ/360 × 2πr = 300/360 × 2 × 22/7 × 14 = 220/3 = 73.33 cm Perimeter of the sector = Length of the arc + 2r = 73.33 + 2(14) = 101.33 cmTHIS WEEK's
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