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Question
In a right circular cone , the cross-section made by a plane parallel to the base is a
Options
circle
frustyum of a cone
sphere
hemisphere
Solution
When a plane parallel to the base of a cone cuts it, then a frustum and a smaller cone is formed.
The cross-section thus formed will be a circle.
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The volume of the frustum of a cone is `1/3 pih[r_1^2 + r_2^2 - r_1r_2]`, where h is vertical height of the frustum and r1, r2 are the radii of the ends.