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110 = 2 x 3,14 x r
110 = 6,28 x r
r = 110/6,28
r = 17,5
r = ?
K=2phi r
110= 2 x 22/7 x r
110= 44/7 x r
110/44/7 = r
110 x 7/44 = r
r = 17,5 m
Jadi, jari-jari lapangan tsb adalah 17,5 meter
Option d. 17,5