Q.

 A cylindrical pencil sharpened at one edge is the combination of :

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a

A cone and a cylinder

b

Frustum of a cone and a cylinder

c

Two cylinders

d

 A hemisphere and a cylinder

answer is A.

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Detailed Solution

The sharpened part of a cylindrical pencil sharpened at an edge is conical. The unsharpened part of the pencil is cylindrical.

Hence, a cylindrical pencil sharpened at an edge is a combination of a cone and a cylinder.

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 A cylindrical pencil sharpened at one edge is the combination of :