Comment on Ask HN: Do you know any useful "Back of the Envelope Calculations"?parentComments−zalew15ykilometer is km not ks. just sayin'−nailer15yOne is an abbreviation. The other is a coloquial term, pronounced 'kays' used in most western speaking metric countries.
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kilometer is km not ks. just sayin'
One is an abbreviation. The other is a coloquial term, pronounced 'kays' used in most western speaking metric countries.