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Loanloan123
2 năm trước
Gioir toán giúp ạ Bài 2:Một bể cá dạng hình hộp chữ nhật làm bằng kính (không có nắp) có chiều dài 40 cm, chiều rộng 55 cm, chiều cao 50 cm. Mực nước ban đầu trong bể cao 35 cm. a) Tính diện tích kính dùng để làm bể cá đó. b) Người ta cho vào bể một hòn đá có thể tích 8 dm3. Hỏi mực nước trong bể lúc này cao bao nhiêu xăng – ti-mét?
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