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nguyenmanhan19
2 năm trước
Tuyến đường sắt từ Hà Nội đến thành phố Hồ Chí Minh dài 1.730 km . Tàu hỏa đi trên tuyến đường này mất 32 giờ . a tính vận tốc trung bình của tàu hỏa trên tuyến đường này B, chuyển động của tàu trên đoạn đường này có phải là chuyển động đều không ?Tại sao?
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