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keliling = 22/7 x 84
keliling = 264 cm
panjang lintasan = 264 x 2.500 = 660.000cm atau 6,6 km
rumus luas lingkaran yg diketahui d = 1/4 μd²
= 264 cm
p lintasan = 264 x 2.500
= 660.000cm
= 6,6km