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roda berputar = 50 kali
d = 10 cm
maka :
K = π x d
= 3,14 x 10
= 31,4 cm
jadi jarak y ditempuh = 50 x 31,4 = 1.570 cm (B)
= 3,14 X 10
= 31,4
Jarak tempuh = Keliling X banyak putaran roda
= 31,4 X 50
= 1.570 cm