Definite volume refers to something which has a consistent, unchanging volume, which in practical terms may mean a static mass and density, or a predetermined shape, either of which will dictate volume. A cube with side length l has a definite volume because it can only be exactly one size.
One cup of raw plantains or one medium sized raw plantain contains: ~180-200 calories, 0.5 g total fat, 47-50 g carbohydrates, 3.5 g dietary fiber, 22 g sugar and 2 g protein. Because of it's high carbohydrate content, you need to monitor your portion, otherwise your blood sugars will spike.
Carbohydrates are made up of carbon, hydrogen and oxygen. Carbohydrates are also called saccharides, or sugars. Some examples of carbohydrates are glucose (grape sugar), sucrose (cane sugar) and lactose, which is found in milk. They are used for the storage of energy and structural components in plants.