Answer: The wall is actually 2.5 meters tall.
Explanation: Given that in the picture the broom is 2cm long and in reality the broom measures 1 meter long, along with the fact that 100cm equals 1 meter, we can calculate that anything in reality will be 50 times greater than in the picture.
From there, simply multiply the height of the wall by 50 in order to get the real-life height of the wall (5cm), which is 2.5 meters tall.


Hope this helps!