Question

A cone is cut through a plane parallel to its base and then the cone that is formed on one side of that plane is removed. The new part that is left over on the other side of the plane is called

(a) a frustum of a cone

(b) cone

(c) cylinder

(d) sphere

Answer 1

Solution:(a) a frustum of a cone 

[When we remove the upper portion of the cone cut off by plane, we get frustum of a cone]