Question

2. Why is it necessary to have a standard unit of length?​

Answer 1

$\sf\purple{➛}$A unit of measurement which has a fixed value which does not change from person to person or place to place, is called a standard unit of length. It is necessary to have standard units of measurements for the sake of uniformity in measurements.

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Answer 2

Answer:

unit of measurement which has a fixed value which does not change from person to person or place to place, is called a standard unit of length. It is necessary to have standard units of measurements for the sake of uniformity in measurements.