Bài 3: Một hình hộp chữ nhật có diện tích xung quanh bằng 560 cm2, chiều cao 10 cm, chiều rộng bằng chiều dài.
a) Tính diện tích toàn phần. b) Tính thể tích.
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m, chiều rộng 
m, chiều cao 
m.
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