For this case we have that by definition:
1 meter equals 1000 millimeters
Then, making a rule of three we have:
1m ----------> 1000mm
10m --------> x
Where "x" represents the number of mm equivalent to 10m
[tex]x = \frac {10 * 1000} {1}\\x = 10000 \ mm[/tex]
Thus, 10m equals 10000mm
Answer:
10000mm
