A ladder leans against a wall at an angle of 30° with the ground. If the distance between the foot of the ladder and the wall is 18 meters, then what is the length of the ladder?
1
\(12\sqrt 3\:m\)
2
\(6\sqrt 3\;m\)
3
\(18\sqrt 3\;m\)
4
\(\frac{1}{{\sqrt 3}}\;m\)