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A quart is an English unit.
It is a customary unit.
1 foot = roughly 30.48 cm 1 cm = roughly 0.0328 foot The difference between 1 cm and 1 foot is about 29.48 cm, or 0.9672 foot, or 11.606 inches. The cm is a metric unit. The foot is an English unit.
The yard is an English, or customary unit.
As far as I am aware, the second (measure of time) is the only unit common to the English and metric system.