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diemlai2810
1 năm trước
Một hình hộp chữ nhật có diện tích xung quanh là 140 mét vuông .Chiều dài hơn chiều rộng 2m,chiều cao là 5m. a.Tính chu vi mặt đáy b.Tính diện tích toàn phần của hình hộp chữ nhật đó.
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