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An inch is more precise than a foot. There are 12 inches in one foot. Consider if you were to label someone as being 5 feet in height. Assuming you were rounding to the nearest foot, this means they can be as short as 4 feet 6 inches (because of rules of rounding up when you are directly between values), which is equal to 137.16 centimetres, or as tall as 5 feet 5.99... inches, which is equal to 167.64 centimetres. In other words, if you were merely measuring in feet and rounding either up or down, you can be as much as 6 inches (15.24 cm) out in either direction. Whereas, if you measure someone in feet and inches, and you are rounding either up or down, you can be accurate to within half an inch (1.27 cm) either side.

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15y ago

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