Looking to find out the duration needed to complete 20 questions in Kahoot?

You are in the correct place.

The answer is it depends on the type of questions being asked.

If all 20 questions are all multiple-choice questions, then it will take less time to complete since you just have to choose either one of the choices as your answer. Of course, the time needed to complete still varies due to the complexity of the questions being asked.

So the short answer is it really depends.

Troubled by what names to use in Kahoot?

We have a list that can help you out with that.