If it takes 10 minutes to boil 10 eggs, it will likely take the same amount of time to boil 20 eggs. The cooking time for boiling eggs typically depends on the amount of water and the heat applied, rather than the number of eggs.
When boiling eggs, the water in the pot reaches a certain temperature, and the eggs cook within that environment. Adding more eggs to the same pot won't significantly change the cooking time because the boiling water maintains a consistent temperature.
However, it's essential to ensure that the pot is large enough to accommodate all the eggs without overcrowding, as this can affect the cooking process. If you're cooking 20 eggs at once, make sure to use a pot that can comfortably hold all the eggs in a single layer to ensure even cooking.
So, assuming you're using a suitable pot, boiling 20 eggs will still take approximately 10 minutes, just like boiling 10 eggs.