Question

The standard unit of length is​

Answer 1

Answer:

length that needs to be measured, we can convert a meter into various units like millimeters (mm), centimeter (cm), and kilometer (km).

The standard unit of length based on the metric system is a meter (m)

Answer 2

The standard unit of length is​ meter ($m$)

Explanation:

• The SI unit of length or linear measure, is meter($m$).  The meter was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle
• It is defined by taking the fixed numerical value of the speed of light in vacuum $c$ to be $299 792 458$ when expressed in the unit $ms^{-1}$, where the second is defined in terms of Δ$v_{Cs}$.