Question

why does a measurement need both a number and a unit for its complete specification

Answer 1

It is because if there is no number, then we will not know how much is the measure. If there is no unit, we will not know what unit ( it can be anything - m, cm, km, l, ml, etc.) . So we should always specify

Plz give thanks and vote

Answer 2

$\huge\mathbb{ANSWER:-}$

• Measurement need both a 'number' and a 'unit' for its complete specification as the former number tells us as to how many times does unit get contained in the length to be measured.