For this case, the first thing you should do is compare the height of the door with the height of a person.
On average, a person's height is between the following values:
1.40 meters - 1.80 meters
Therefore, we must find an amount that is greater than the maximum amount of a person's height.
Therefore, a reasonable measure for the height of the door is:
2 meters
Answer:
a reasonable estimate is 2 meters.