30mm is 3cm (divide mm by 10)
30mm*230mm = 6900 millimetres = 271.653543 inches
It tells you how many miles a certain distance on the map represents
30mm is 3cm
3cm = 30mm.
There are eight ascending notes in a major scale, and eight descending notes. A scale represents one octave. A chromatic scale has thirteen ascending and thirteen descending notes.
3cm = 30mm