If a thread is wound around a cone starting from a point on

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ESE (IES) EE 2017 (Non Technical)
Engineering aptitude
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Engineering aptitude

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If a thread is wound around a cone starting from a point on the base, and brought back to the same point, then the shortest possible length of the thread is equal to the :

[ESE (IES) EE 2017 (Non Technical)]

A Diameter of the base of the cone

B Slant height of the cone

C Largest chord of the development sector

D Length of the perpendicular from a corner of the development sector to the opposite edge