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  1. A sector is formed by opening out a cone of base radius 8 cm and height 6 cm. Then the radius of the sector is (in cm)
    1. 4
    2. 8
    3. 10
    4. 6
Correct Option: C

Radius of sector = Slant height of cone = √r² + h²
= √6² + 8²
= √36 + 64 = √100
= 10 cm


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