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9856 = 22/7.r²
r² = 9856 : 22/7
r² = 9856 . 7/22
r² = 3136
r = √3136 = 56 cm
banyak putaran = jarak : K lingkaran
= 1,76 km : 2.phi.r
= 176000 cm : 2.22/7.56 cm
= 176000 cm : 352 cm
= 500 kali