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meodau
2 năm trước
Bạn Hà và Bạn An cùng đi xe đạp từ làng lên đền Gióng nhân dịp tết cổ truyền dân tộc trên quãng đường dài 60 km khởi hành cùng một lúc. Vận tốc của bạn An lớn hơn vận tốc của bạn Hà là 2km/h nên bạn An đến nơi sớm hơn bạn Hà 1 giờ . Tính vận tốc của mỗi người.
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