The area and circumfrence of a circle is equal when radius is 2 unit what is mean by 2 unit here Let assume it equal to at 2 feet
but when we convert feet in cm
then My question is Why the circumfrence area doesnt equal
in both case measurment is same ??

Dear student
circumference and Area both are different . It is not possible for the same circle , its area and perimeter are same.
Area of circle is  = πr^2 
perimeter of circle is = 2πr 
In your case it is just a coincidence but in actually both are different.
Regards...
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