A sector of a circle of radius 14cm containing ... - WAEC Mathematics 2007 Question
A sector of a circle of radius 14cm containing an angle 60o is folded to form a cone. Calculate the radius of the base of the cone
A
5\(\frac{1}{2}cm\)
B
4\(\frac{2}{3}cm\)
C
3\(\frac{1}{2}cm\)
D
2\(\frac{1}{3}cm\)
Ask EduPadi AI for a Detailed Answer
Correct Option: D
Length of arc = circumference of the base of the
cone (\frac{\theta}{360} \times 2\pi R = 2 \pi r)
(\frac{\theta R}{360}) = r
r = (\frac{60 \times 14}{360})
= (\frac{7}{3} = 2\frac{1}{3})cm
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