Verified Answer :

KIMMUS

Hey!


We know Circumference = 2πr

Where,

r - radius of the circle.

Since it is given that d = 11mm

r = d/ 2

= 5.5 mm

= 0.55 cm

Therefore, Circumference = 2π × 0.55

= 3.455 cm

= 3. 46 cm

≈ 4 cm

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