Definition: The centimetre is a unit of length in the metric system, equal to one-hundredth of a metre. 1cm is equivalent to 0.39370 inches.
What is the use of centimeter?
It is used to measure small objects, for example, notebooks, pencils, and bottles. Most rulers come with two measurement metrics, centimeters, and inches and are made usually in lengths of 15 cm and 30 cm.
Is a 12 second 100m good?
12.5–13 seconds is above average, 12–12.5 is probably the top 15%, and 11- 12 would probably put you in the top 10%.
Is a 15 second 100m good?
15 seconds per 100m is the right pace for 3:45 for 1500m or 4:01 for a mile. so if you are 26-years-old you will probably not break 2:00 for 800m in this lifetime, but if you are 16-years-old you show a lot of potential.