Question

What is the need for measurement? What are standard units and why are they important?

Answer 1

Measurement is needed because it is required to find out accurate length, area, volume or mass of different objects for various purposes.
Standard unit refers to a definite magnitude that is taken as a standard for measuring physical quantities.
Standard units are important because they do not change from person to person and one gets the same measurement irrespective of the person doing the measurement.