The length of a rope is 2 m and its diameter is 1 mm. Ratio of length of the rope to its diameter is
2000:1
The ratio is the method of comparison between two similar quantities having the same unit.
So, 2 m = 2000 mm [∵ 1 m = 1000 mm]
Hence, the ratio of the length of rope to its diameter = 20001 = 2000:1