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2(22/7 x 7²) x 10
2(154) x 10
308 x 10 = 3080 cm =30,8 m³
r:jari jari t:tinggi. phi:22/7 atau 3,14.
V:22/7 X 7 X 7 X 10 = 22X70 =1.540 cm pangkat 3.