why can't a foot or cubit be used as a standard unit of length

can any 1

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Because it can differ from person to person. Like a 12 year old will havea smaller foot and smalller cubit than a 40 year old man



  • 5

we cannot because the lenght of a cubit is not accurate.........

  • -2

we cannot use it because they vary from person to person

  • -1

Foot or cubit can be used as a standard unit of length as they are inaccurate and vary from person to person. It's not helpful if we want exact measurement. That's why the SI unit of measurement was developed by scientists from all over the world. 

  • 2

this is because every persons foot and hands differ so to be appropriate it is important to follow the standard units.

  • 1
because it is not accurate
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