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anna1976
2 năm trước
giải bài toán bằng cách lập hpt 1 ô tô khởi hành từ A vs vận tốc 50km/h qua 1h15 phút ô tô thứ 2 cũng khởi hành từ A đi cùng hướng vs ô tô thứ 1 vs vận tốc 40km/h hỏi sau mấy giờ thì ô tô gặp nhau điểm gặp ngau cách A bao nhiêu km lm gấp giúp mk với ạ mk cảm ơn
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