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2022-05-23 09:06:54
Bán kính của bồn hoa là 31.4÷3.14 ÷2=0.5( m)
diện tích bồn hoa là 0.5×0,5×3.14=0.785m²
Bán kính của bồn hoa là 31.4÷3.14 ÷2=0.5( m)
diện tích bồn hoa là 0.5×0,5×3.14=0.785m²