Một thửa đất hinh tam giắc có trung bình cộng của cạnh đây và chiều cao là 53,1m,chiều cao kema cạnh đây 14m.trên thửa đất người ta trồng lúa cứ 1m vuông đất sẽ thu hoạch đc 0,5kg thóc.tính diện tích thửa đất đó là bao nhiêu mét vuông?.tính số thóc thu đc trên thửa ruộng đó

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