The perimeter of a rectangle is 108 m, and its length is five times as long as its width. Length:

Length: 30 m

Width: 6 m

Explanation:
Let the width of the rectangle be x.
Since the length is five times as long as the width, the length is 5x.
The perimeter of a rectangle is given by the formula: 2(length + width)
Therefore, the perimeter of the rectangle can be expressed as: 2(5x + x) = 108
Simplifying the equation: 2(6x) = 108
12x = 108
x = 9

Therefore, the width of the rectangle is 9 m and the length is 5 times the width, which is 5(9) = 45 m.