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2 năm trước
Một thửa ruộng hình thang có đáy bé 60m và bằng 3/4 đáy lớn, chiều cao bằng trung bình cộng của 2 đáy. Người ta trông lúa trên thửa ruộng đó, cứ 100m2 thu được 65kg thóc. Hỏi trên thửa ruộng đó người ta thu được bao nhiêu tấn thóc? Mình đang cần gấp, nhanh hộ mình nhé!!!!
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