What are units fundamental units derived units and System of units

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1.	What are units fundamental units derived units and System of units
Answer» The units which are independent of each other are known as Fundamental Units. Derived Units are derived from Fundamental Units. For example, meter is a fundamental unit of length and second is a fundamental unit of time. However, meter per second (ms-1) is a derived unit of velocity. There are seven fundamental units as given in the below table:		No.	Quantity	Fundamental Unit	Symbol

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