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keliling roda = 2512/2000
=1,256 m^2
atau dalam cm = 12.560 cm^2
r bisa dicari
keliling lingkaran=2pi.r
12560= 2. 3,14 . r
r= 12560/(2.3,14)
r= 2000 cm
cari luas nya
L= pi . r^2
=3,14 . 2000^2
=12.560.000 cm^2
silakan dikoreksi