Unit:- A unit is a measurement of a chosen standard quantity. Other quantities of similar nature can be expressed as a multiple of the unit.
Types of unit:- Units are of two types 1) Fundamental units. 2) Derived Units.
Fundamental Units:- The units which are independent of each other are known as fundamental units. for example – Meter is the unit of length and second is the unit of time.
Derived Units:- The units which are derived from fundamental units are known as derived unit. for example – Meter per second (ms-1 ) is the unit of velocity.
System of unit:-
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