GENERAL KNOWLEDGE

Detailed explanation-1: -The metre, symbol m, is the SI unit of length. 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 m s–1, where the second is defined in terms of the caesium frequency Cs.

Detailed explanation-2: -The basic unit of length in the SI system is the meter. The meter was originally intended. to be one ten-millionth of the distance from the Equator to the North Pole (at sea level). The meter has since been redefined as the distance travelled by light in a vacuum in.

Detailed explanation-3: -The metre (or meter in American spelling; symbol: m) is the base unit of length in the International System of Units (SI).

Detailed explanation-4: -Metre is the SI unit of length. Was this answer helpful?

Detailed explanation-5: -So, a measurement of a base quantity could be expressed in terms of a base unit in any system of units using the same base quantities. For example, length is a base quantity in both SI and the English system, but the meter is a base unit in the SI system only.