Question

why do we need standerd unit for measurement​

Answer 1

For the sake of uniformity we did standard units for measurement.

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Answer 2

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We need standard unit for measurement to make our judgement more reliable and accurate. ... Thus there should be uniformity in measurement. For the sake of uniformity we need a common set of units of measurement, which are called standard units. Nowadays Si units in science and technology almost universally.

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