Question

Why is length a fundamental unit?​

Answer 1

Explanation:

The fundamental units are the units of the fundamental quantities, as defined by the International System of Units. ... In the International System of Units, the fundamental units are: The meter (symbol: m), used to measure length. The kilogram (symbol: kg), used to measure mass.

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Answer 2

The seven fundamental S.I units are:−

metre → for length

second → for time

kilogram → for mass

kelvin → for temperature

ampere → for electric current

candela → for luminous intensity

mole → for the amount of substance.