A cylinder is a closed solid that has two parallel (usually circular) bases connected by a curved surface. It can be a right cylinder or an oblique cylinder.
Learn how to find the volume of a partly filled horizontal cylinder like this one: The volume formulas for cylinders and cones are very similar: So a cone's volume is exactly one third ( 1 3 ) of a cylinder's volume. In future, order your ice creams in cylinders, not cones, you get 3 times as much!