Question

The S.I. unit of length is:
A. Metre
B. Kilometre
C. Foot
D. yard

Answer 1

Hint: Try to recall the International System of Units which is a system of physical units. SI units are the standardised units of the world. Now, by using this you can easily find the correct option for the given options.

Complete step by step solution:
-It is known to you that matter has so many properties. It can be mass, volume, density and temperature and many others.
-The S.I. stands for the International System of Units. It is also known as a metric system which is used around the whole world.
-There are seven basic units in the S.I. system which are as follows:
1. Kilogram: It is the S.I. unit of mass.
2. Metre: It is the S.I. unit of length.
3. Second: It is the S.I. unit of time.
4. Kelvin: It is The S.I. unit for measuring temperature.
5. Mole: It is the S.I. unit for measuring quantity of matter.
6. Ampere: It is the S.I. unit for measuring electric current.
7. Candela: It is the S.I. unit for measuring luminous intensity.
-Other units for measuring length are kilometre, foot, yard etc.
Therefore, from above we can conclude that option A is the correct option to the given question.

Note: It should be remembered to you that we can convert from other units to the S.I. Unit. Also, you should remember that This global standard is set by the International Bureau of Weights and Measures (BIPM) which is headquartered in Paris.