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D = 70 cm
berputar sebanyak 400 kali
maka :
K = π x d
= 22/7 x 70
= 220 cm
jadi jarak y ditempuh = 220 x 400 = 88.000 cm = 880 m
=π x 70
= 220 cm
jarak yang ditempuh = 220 x 400
=880 m