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Verified Answer :

To work out the Circumference of a circle, we must o the calculation
πd
π x d
If we fill in the information we know
π x 10.4
3.14 x 10.4       (to 2 d.p.)
↓
32.656 (units)

The circumference = 2.π.r or π.d
r: radius
d: diameter

The circumference = π.10,4 = 10,4π 
or
for π=3,14 ; The circumference = 10,4 . 3,14 = 32,656

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