Question

When a pyramid or a cone is cut by a plane parallel to its base, thus removing the top portion, the remaining portion is called ___________

(a) cylinder

(b) frustum

(c) prism

(d) polyhedron

I got this question in an international level competition.

I would like to ask this question from Basics of Solids in chapter Projection of Solids of Engineering Drawing

Answer 1

Correct answer is (b) frustum

To explain: When a pyramid or a cone is cut by a plane parallel to its base, thus removing the top portion, the remaining portion is called its frustum. When a solid is cut by a plane inclined to the base it is said to be truncated.