Jawabanmu

2014-06-01T11:49:51+07:00
K = 2πr
314 = 2 × 3,14r
314 = 6,28r
314/6,28 = 6,28r/6,28
r = 50
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2014-06-01T12:04:31+07:00
Kll = 2. π . r
314 = 2 . 3,14 . r
314 = 6,28 . r
r =  \frac{314}{6,28}
r = 50 cm 

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