câu 1 : một ô tô đi từ tỉnh A lúc 7 giờ 30 phút và đến tỉnh B với vận tốc 50km/giờ.Hỏi đến lúc 11 giờ 45 phút thì ô tô cách A bao nhiêu xa ? câu 2 : trong học kì I,số học sinh tiên tiến của lớp 5A chiếm 42% số học sinh cả lớp,sang học kì II số học sinh tiên tiến nhiều hơn học kì I là 1 học sinh nên chiếm 44,5% số học sinh cả lớp.Hỏi lớp 5A có bao nhiêu học sinh ? giải giúp e với ạ,hứa vote 5s <3

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