A skateboard is more likely to be 40 centimeters long rather than 40 meters long. Skateboards typically range from 70 to 84 centimeters in length, making 40 centimeters a plausible measurement. On the other hand, 40 meters would be an unusually long length for a skateboard and would not be practical for regular use.
CM
skate board
3.81 cm
If Facebook is 25 centimeters long then it is 250 millimeters long.
a paper clip is 3 centimeters
There are 12.7 centimeters in 5 inches.
3.4 kilometers is 340,000 centimeters.
1 meter=100 centimeters
A meter is equal to 100 centimeters.
A pencil is about 19 centimeters long
Inches if you are in the US, centimeters or millimeters everywhere else.