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r (jari - jari) = 35 cm
π = 22/7
Dit : n (banyak putaran roda) = ?
Jwb : s = πdn
n = s/π2r
= 88000/(22/7 × 35 ×2)
= 88000/(22 × 5 × 2)
= 88000/220
= 400 kali
= 2 x 22/7 x 35
= 220 cm
880m = 88.000cm
berputar =88.000 /220 = 400 kali