Question

Find the circumference of a circle whose radius is:
2.1​

Answer 1

=> Given radius = 2.1 m

=> We know that area of circle = r²

A = ( 22/7 ) × ( 2.1 )²

A = 22/7 × 4.41

A = 13.86 m²

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Answer 2

Answer:

13.2

Step-by-step explanation:

Radius= 2.1cm

Circumference=2πr

= 2x22/7x2.1=  13.2