* Coin Shape: 20c coins are circular. Circular objects don't pack perfectly together, leaving gaps.
* Orientation: How the coins are stacked and arranged will affect how many fit. Are they in a single layer, stacked vertically, or some other arrangement?
* Coin Diameter and Thickness: The exact dimensions of a 20c coin will vary slightly depending on the country.
To get a rough estimate, you'd need to:
1. Find the dimensions of your specific 20c coin.
2. Calculate the volume of a single coin.
3. Estimate the packing efficiency. This is a complex factor, but you can likely find some general information online about packing efficiency for circles.
4. Divide the volume of the liter (1000 cubic centimeters) by the volume of a single coin, then multiply by the packing efficiency.
This will give you a rough estimate of how many 20c coins would fit in a liter.
Important Note: This is a theoretical calculation. In reality, you won't be able to fit that many coins due to the gaps and the difficulty of perfectly packing them.
