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dangthidao1976
2 năm trước
Một cái bể nuôi cá dạng hình hộp chữ nhật có chiều dài 2 mét,chiều rộng 1,5 mét,chiều cao 1,2 mét,bể không nắp.Tính diện tích kính để làm bể,tính thể tích nước trong bể,mực nước trong bể chiếm 1/2 bể,tính chiều cao mực nước trong bể ,tính thể tích nước trong bể.Người ta thả hòn non bộ vào thì mực nước dâng thêm 3dm.Tính thể tích của hòn non bộ
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