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2022-08-04 10:34:15
Gọi vận tốc cano khi nước lặng là x km/h với x>2
Vận tốc cano khi xuôi dòng: x+2 (km/h)
Quãng đường cano đi xuôi dòng:
Vận tốc cano khi ngược dòng: (km/h)
Quãng đường cano đi ngược dòng: (km/h)
Do độ dài quãng đường xuôi dòng và ngược dòng như nhau nên ta có pt:
(km/h)
Độ dài AB: