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Mathematics, 31.07.2021 07:00 desiiraee6265
Một thùng hình trụ (có đáy tròn) chứa đầy chất lỏng đang được rút cạn dần qua một lỗ tròn nhỏ ở đáy. Nếu thùng có chiều cao là 9 ft với bán kính đáylà 4 ft, và lỗ thoát có bán kính 1 inch thì mất bao lâu thùng sẽ cạn nước?
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Một thùng hình trụ (có đáy tròn) chứa đầy chất lỏng đang được rút cạn dần qua một lỗ tròn nhỏ ở đáy....
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