What's 50 centimeters on a tape measure?!
This should be approximately 50, because any ruler has an error to see where you used it
Equal to 0.5 meters, or 50 centimeters
A tape measure of 50 centimeters should be equal to 50 centimeters, and if it does not equal 50 centimeters, then this tape measure is defective and should be scrapped and not usedGood luck, bye bye