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Question

What is the pair of figures we would get if we cut open a right circular cone of radius r and slant height l?

A
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Solution

The correct option is C
The following pair of figures is obtained when we cut open a right circular cone of radius r and slant height l :

The slant height of the cone is the radius of the sector. The circumference of the base of the cone is the arc length of the sector.

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