Jawabanmu

2014-02-06T20:28:05+07:00
2014-02-06T20:28:15+07:00
Luas lingkaran = phi r kuadrat
706,50 = 3,14 r kuadrat
706,50/3,14 = r kuadrat
225 = r kuadrat
 \sqrt{225} = r
r = 15

jadi panjang jari-jari = 15 (c)