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Physics, 25.07.2021 22:10 yqui8767

1 ô tô đi từ A đến B, 1/3 quãng đường AB xe chạy với vận tốc 60km/h, 3/4 thời gian còn lại xe chạy với vận tốc 50km/, cuối cùng xe chạy với vận tốc 40km/h. Tính vận tốc trung bình

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1 ô tô đi từ A đến B, 1/3 quãng đường AB xe chạy với vận tốc 60km/h, 3/4 thời gian còn lại xe chạy v...
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