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Question

Which of the following cannot be used as a standard unit of measurement?



Your Answer
A

Metre

Correct Answer
B

Human foot

Your Answer
C

Yard

Your Answer
D

Kilometre


Solution

The correct option is A

Human foot


Standard units of measurement must have a constant measurement throughout. The length of a human foot varies from person to person. It also varies with age for the same person. Due to this, a human foot cannot be used as a standard of measurement.

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