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BossMXH
2 năm trước
Hai xe máy khởi hành cùng một lúc từ A đến B . Xe máy thứ nhất có vận tốc trung bình lớn vận tốc trung bình của xe máy thứ hai 10km/h, nên đến trước xe máy thứ hai 1h. Tính vận tốc trung bình của mỗi xe máy, biết rằng quãng đường AB dài 120 km
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