A footstep cannot be used as a standard unit of length, why?

It is same for everyone.

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It differs person to person.

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The accuracy is not a problem.

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It is accurate but any unit does not suit for this.

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Solution

The correct option is B
It differs person to person.

We cannot consider a footstep for measuring the length as it differs from person to person, the stride is not equal for everyone. One can observe this difference by measuring the length of the stride for an adult and a school going kid. Both of them will be different in length.

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Similar questions

Why is a foot step,or a handspan, not used as a standard unit of length?

Why can we not use the length of a rod as a standard unit?

The length of a foot can be used as a standard unit.

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