Đề bài : Một ô tô chạy từ A đến B. Nếu mỗi giờ chạy 60km thì đến B lúc 14 giờ. Nếu mỗi giờ chạy 40km thì đến B lúc 16 giờ. a, Tính quãng đường AB. b, Hãy tính xem trung bình mỗi giờ ô tô đó phải chạy mấy km để đến B lúc 15 giờ. Mong đc sự giúp đỡ từ mn ạ Nhanh lên mn nhé Em đang cần gấp Nếu chị tttt1111, anh quangcuong, chị li_2k5, chị hangbich, bn kunchan và những người hạng thiên tài, BĐHH, đội mod, chuyên gia mà trl câu hỏi này thì em sẽ có một phần quà đặc biệt.

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