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yourname01
2 năm trước
Chiều của một đường đua hình tròn là 3,6 km.hai xe máy chạy trên đường này hướng tới gặp nhau với vận tốc v1 là 36km/h và v2 là 54km/h.hãy xác định thời gian nhỏ nhất tính từ thời điểm họ gặp nhau tại một nơi nào đó trên đường đua đến thời điểm họ gặp nhau tại chính nơi đó
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