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vuthiphuong10801
2 năm trước
Hai địa điểm A và B cách nhau 33,8 km .lúc 7 giờ 30 phút người thứ nhất đi từ A đến B với vận tốc 10 km h lúc 8 giờ người thứ hai đi từ B đến A với vận tốc 14 km h. Hỏi: A)hai người gặp nhau lúc mấy giờ? B) chỗ gặp nhau cách từ điểm A bao nhiêu km
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