Mathematics · Mensuration
A sector containing an angle of 120° is cut off from a circle of radius 21 cm and folded into a cone such that the bounding radii join together. What is the curved surface area of the cone? (Take π = 227)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1462 cm2✓
- 2432 cm2
- 3426 cm2
- 4262 cm2
Correct answer
462 cm2
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