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449,000,000 centimeters is about 45,000,000,000 times as long as a Strand of Hair.
In other words, the length of a Strand of Hair is 0.0000000000220 times that amount.
(average)
A strand of human hair averages 99 µm (micrometers), with blond hair being the finest and black hair the thickest. On a healthy scalp, each strand of hair will last up to 6 years.
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