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2 x phi x r x 500 = 70650
2 x 3,14 x r x 500 = 70650
3140 r = 70650
r = 22,5 cm
keliling = 2 x phi x r
= 2 x 3,14 x 22,5
= 141,3 cm
2 x phi x r x 500 = 70650
2 x 3,14 x r x 500 = 70650
3140 r = 70650
jadi, r = 22,5 cm
keliling = 2 x phi x r
= 2 x 3,14 x 22,5
= 141,3 cm semoga membantu