Why is the most common ruler length 30cm, is there a reason for this?
In: Mathematics
Because America.
Uh…well, I mean they didn’t wanna give up their foot and inches. So they made a compromise.
Other countries, UK probably:”hey why can’t you use our metric system? Everyone’s using it but you guys.”
America:”cause we don’t want to :)”
“Please? How we gonna communicate if you guys are using foots and inches? What’s a foot or inches even?”
“Okay fine….we’ll use your damn metric systems. But we’ll still keep our foots and inches.”
And thus…the rulers with centimeters.
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