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bebe9a29
2 năm trước
hai otô đi từ A đến B , vận tốc oto thứ nhất là 40km/h , vận tốc otô thứ 2 là 25km/h. Để di hết quãng đường otô thứ nhất cần ít thời gian hơn otô thứ 2 là 1h rưỡi . Tính quãng đường AB giải bằng cánh lập phương trình ạ! mng giúp em với
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