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Mathematics, 20.06.2021 22:40 markaylarowland8

Cho 1 hình chữ nhật có chiều dài gấp 3 lần chiều rộng . Nếu tăng chiều dài thêm 7cm thì diện tích tăng 630cm2. Tính chu vi hình chử nhật ban đầu

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Cho 1 hình chữ nhật có chiều dài gấp 3 lần chiều rộng . Nếu tăng chiều dài thêm 7cm thì diện tích tă...
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