There are 13 meters long, ladder teachers taken place to lean on the wall by wall, the ladder base apart 5 m would like to note that at the end of the stairs, another side of the floor is approximately how many meters.
Teachers are 13 meters long ladder placed across the wall by the stairs to the wall base 5 meters away on the other side I know that the ladder is about few meters above the ground.
The teacher has a long staircase 13 meters. Placed on the base wall ladder against the wall 5 meters apart I want to know that the ladder side high from the ground between a few meters.