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thanhtam2k
2 năm trước
Câu 41. Một học sinh đi học từ nhà đến trường có khoảng cách là 1200m với tốc độ 2,5 m/s. Trên đường đó có 4 ngã tư được lắp đèn đỏ, thời gian để dừng đèn đỏ ở mỗi ngã tư dài nhất là 30 giây. Hỏi thời gian để học sinh đó đi tới trường nhiều nhất là: A. 12 phút B. 10 phút C. 8 phút D. 6 phút Giải chi tiết nhá
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