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lanngoc123
2 năm trước
Một xe ô tô chuyển động trên đoạn đường AB bằng 135km với vận tốc trung bình là 45km/h. Biết nửa thời gian đầu vận tốc của ô tô là 50km/h. Tính vận tốc của ô tô trong nửa thời gian sau. Cho rằng trong các giai đoạn ô tô chuyển động đều(làm tóm tắt lun nhé)(mik tặng 5 vote)
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