Question 16
Mensuration of SolidsA sector of a circle of radius 14 cm containing an angle 60° is folded to form a cone. Calculate the radius of the base of the cone.
- A.5½ cm
- B.4⅔ cm
- C.3½ cm
- D.2⅓ cm
Show the answer and explanation
Answer: D (2⅓ cm)
Explanation
Arc length = circumference of base: (60/360) × 2π × 14 = 2πr, so r = 14/6 = 2⅓ cm.