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huyngo5598
2 năm trước
Trên một đường gấp khúc tạo thành một tam giác đều ABC có hai xe khởi hành cùng lúc từ A. Xe 1 chuyển động theo hướng AB với vận tốc không đổi 3m/s, xe 2 chuyển động theo hướng AC với vận tốc không đổi 2m/s. Mỗi xe chạy 5 vòng. Hãy xác định số lần gặp nhau, vị trí và thời điểm gặp nhau của 2 xe ( không kể những lần gặp ở A)
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