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d = 110 ÷ 22/7
d = 110 ÷ 7/22
d = 35 cm
r = 35 ÷ 2
r = 17,5 cm
= 110/2x(22/7)
=55 : 22/7
=55 x 7/22
=17,5 cm
Jadi jari jari nya 17,5 cm