> How many yards is a mile??? How many feet? And… how many meters is a km? How many cms Why do people always say this kind of thing as an attempt to criticize

> How many yards is a mile??? How many feet? And… how many meters is a km? How many cms Why do people always say this kind of thing as an attempt to criticize the old system? Miles, yards and inches are for measuring things in different orders of magnitude. Knowing how many yards there are in a mile isn't useful. If it was, everyone who uses miles or yards would remember. It's no harder than remembering the year in which you were born.