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2023-11-27 19:40:49
a, Chu vi khu đất là:
0,105 x 4 = 0,42 (km)
b, Diện tích khu đất là:
0,105 x 0,105 = 0,011025 (km2)
Đổi 0,011025 = 11,025 ha
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