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Physics, 02.07.2021 19:20 rwlockwood1

1 xe đạp chuyển động trên đoạn AB nữa đoạn đầu đi vs vận tốc 25km/h nữa đoàn đường sau trong thời gian đầu đi vs vận tốc 18km/h nữa thời gian sau đi vs vận tốc 12km/h tính vận tốc trung bình của xe đạp

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1 xe đạp chuyển động trên đoạn AB nữa đoạn đầu đi vs vận tốc 25km/h nữa đoàn đường sau trong thời gi...
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