A) Handspan
B) Cubit
C) Footspan
D) All of these
Correct Answer: D
Solution :
Non-standard units of measurement are those which keep varying. E.g.: any length can be measured to be 10 handspan long by a child while the same table can be measured to be 5 handspan long by an adult. Similarly, measurement of length varies with cubit and footspan. However, it may be 1 metre long independent of who measured it. Thus, metre is a standard unit of measurement of length.
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