Respuesta :

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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