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  • A cylindrical pencil sharpened at one edge is the combination of (A) a cone and a cylinder (B) frustum of a cone and a cylinder (C) a hemisphere and a cylinder (D) two cylinders.

A cylindrical pencil sharpened at one edge is the combination of

(A) a cone and a cylinder    
(B) frustum of a cone and a cylinder
(C) a hemisphere and a cylinder
(D) two cylinders.

Answers (1)

Answer: (A) a cone and a cylinder    

Solution.
(A) A cone –A cone is a three-dimensional geometric shape that tapers smoothly from a flat base to a point called the apex or vertex.
A cylinder – A cylinder is a three dimensional solid that holds two parallel bases joined by a curve surface at a field distance.


(B) Frustum of a cone – It is the portion of a solid that lies between one or two parallel planes cutting it.
A cylinder – A cylinder is a three dimensional solid that holds two parallel bases joined by a curve surface at a fixed distance.

(C) Hemisphere – In geometry it is an exact half of a sphere and it is a three dimensional geometric.
A cylinder – A cylinder is a three dimensional solid that holds two parallel bases joined by a curve surface at a fixed distance.

(D) Cylinder – A cylinder is a three dimensional solid that holds two parallel bases joined by a curve surface at a fixed distance.

Hence form the above diagrams we conclude that option (A) is correct.
Therefore, A cylindrical pencil sharped at one edge is the combination of a cone and a cylinder.

 

 

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