r= 50cm maka d = 100cm
k =
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r= 50cm maka d = 100cm
k =![\pi . d = 3,14 . 100 = 314cm \pi . d = 3,14 . 100 = 314cm](https://tex.z-dn.net/?f=%5Cpi%20.%20d%20%3D%203%2C14%20.%20100%20%3D%20314cm)
D = 100
kel = π.D
= 3,14× 100
= 314 cm