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d = 0,35 m
berputar 4.000 kali
maka :
K = 22/7 x d
= 22/7 x 0,35
= 1,1 m
jadi jarak rumah dan sekolah = 4.000 x 1,1 = 4.400 m = 4,4 km
= 22/7 x 0,35 x 4000
= 4400 m
= 4,4 km