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quanghaonth
2 năm trước
Một hồ bơi đầy nước sẽ chứa được 2600 l nước. Hiện giờ nước trong hồ bơi chiếm 76% thể tích hồ bơi. a) Hỏi hiện giờ hồ đang có bao nhiêu lít nước? b) Người ta mở vòi cho nước chảy vào hồ bơi mỗi phút chảy vào được 40l nước. Hỏi vòi chảy sau bao lâu nước mới đầy hồ bơi.
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