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Question

It is desirable that the standards of units be easily available, invariable, indestructible and easily reproducible. If we use foot of a person as a standard unit of length, which of the above features are not present?


A

Easily available

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B

Invariable

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C

Indestructible

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D

Easily reproducible

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Solution

The correct options are
A

Easily available


C

Indestructible


D

Easily reproducible


The foot of a person is invariable but not available, not indestructible and not easily reproducible. While reproducing there can be human error.


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