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.
(5frac{1}{2}cm) -
B.
(4frac{2}{3}cm) -
C.
(3frac{1}{2}cm) -
D.
(2frac{1}{3}cm)
Correct Answer: Option D
Explanation
(r=frac{theta times l}{360^{circ }}\
r=?, theta =60^{circ }), l = radius of the orginal sector of a circle = 14cm
(r=frac{60times 14}{360}=frac{7}{3}=2frac{1}{3}cm)