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d = K / π
= 88 / 22/7
= 88 x 7 / 22
= 616 / 22
= 28 cm
Jadi diameternya 28 cm
88 = 2 x x r
88 = r
r = 88 x
r = 2 x 7
r = 14cm
D = 2r
D = 2 x 14 = 28cm