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xuanhuy900
2 năm trước
Một thửa ruộng hình thang ABCD có đáy lớn CD bằng 120 m, đáy bé AB bằng đáy lớn. Đáy bé dài hơn chiều cao 5 m. Trung bình cứ 100m² thu hoạch được 64,5 kg thóc. Tính kg thóc thu hoạch được trên thửa ruộng đó. Ai giúp e vs ạ!!
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