What is the length of the cone? 6cm 4cm 2cm

The term "length of the cone" is not standard terminology when describing the dimensions of a cone. A cone typically has measurements such as the radius (or diameter) of its base, height, slant height, and the lateral surface area or the total surface area.

Here's what each of the measurements you provided could potentially refer to in the context of a cone:

1. 6 cm could possibly refer to the height of the cone—the perpendicular distance from the base to the apex (tip).

2. 4 cm could refer to the diameter of the base if you are describing a right circular cone. If it is the diameter, the radius would be half of that, which is 2 cm. However, the 4 cm could also be the slant height, which is the distance from the tip of the cone to a point on the edge of the base, along the outside surface of the cone.

3. 2 cm could be the radius of the base if you are indeed referring to a right circular cone and if the 4 cm previously mentioned is the diameter. Otherwise, it's not clear what the 2 cm measurement would refer to unless additional context is provided.

Without further context or clarity on which dimensions apply to which parts of the cone, it’s impossible to provide a specific answer. If you can specify which measurements correspond to the cone's height, radius/diameter of the base, or slant height, I can help you understand more about the cone's geometry.