Problem Statement: ME Board October 1991
A circular piece of cardboard with a diameter of 1 m will be made into a conical hat 40 cm high by cutting a sector off and joining the edges to form a cone. Determine the angle subtended by the sector removed.
- A. 144°
- B. 148°
- C. 152°
- D. 154°
The angle subtended by the sector removed is 144°.
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