Diameter of circle from circumferance ?

I have a circumferance of 530mm from which I wouldlike to calculate the diameter?
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4 Answers

C=dpi
530=dpi
530/pi mm=d
by Level 5 User (14.8k points)
Thanks -i understood that as 530mm circ divided by 3.14 = 168.8 Diameter. I have placed order of stone diameter to column drums as 170mm.
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