There is a tall building in front of you1 but between you and the building is a fence that is 2 metres tall. The fence is situated 1 metre from the building. You wish to base an extendable ladder on the ground, pass it over the fence so that it touches the top of the fence, and extend it, such that the top of the ladder connects to the building on the other side. What is the minimum length for your extendable ladder that will be capable of accomplishing this goal