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An arc PQ of a circle, centre O, subtends an angle of 2 radians at the centre. This sector is folded to form a right circular cone so that the arc PQ becomes the circumference o…

An arc PQ of a circle, centre O, subtends an angle of 2 radians at the centre. This sector is folded to form a right circular cone so that the arc PQ becomes the circumference o…
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An arc PQ of a circle, centre O, subtends an angle of 2 radians at the centre. This sector is folded to form a right circular cone so that the arc PQ becomes the circumference of the base. Find the height of the cone.​

User Shevan
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The answer is strictly not in my head right now but I believe you know it
User NetraSW
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