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Stronggirl
6 năm trước

bn an đi hok lúc 6h30' và đến trường đúng giờ vào lớp 7h , biết nhần an cách trường 4km.

1).tính vận tốc của bn an đã đi từ nhà đến trường .

2).nếu sau khi đi đc 10 phút xe bị long xích an phải sửa xe mất 5 phút . Để đến trường đúng giờ vào lớp thì đoạn đường còn lại an phải đi vs vận tốc tối thiểu là bao nhiêu ?

Cho rằng chuyển động của bn an là chuyển động đều .

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mình làm như thế này đúng hay sai. nếu đúng trả lời mình nhé

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