Question

Measurement is the comparison of a/an ______ quantity with some ______ quantity of the same kind.

• A. known, unknown
• B. known, known
• C. unknown, known
• D. unknown, unknown

Answer 1

The correct option is C unknown, known

Measurement means the comparison of an unknown quantity with some known quantity of the same kind.
For example: In order to measure unknown length of an iron rod we need to have some known quantities like metre to compare with these unknown quantities. These known quantities are called units.