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Ngolinh123321
2 năm trước
1 thửa ruộng hình thang có đáy lớn 120m,đáy bé kém đáy lớn 40m,chiều cao bằng trung bình tổng cộng hai đáy . Cứ 100m2(vuông) của thửa ruộng đó người ta thu được 65,5 kg thóc . Hỏi cả thửa ruộng người ta thu được bao nhiêu kg thóc ?
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