Lúc 5 giờ sáng Bình đạp xe từ A tới B . Cùng lúc đó Minh cũng đạp xe từ B tới A . 2 người gặp nhau tại điểm C cách B 5km . Sau khi gặp nhay Bình đi tới B rồi trở về A . Còn Minh đi tới A rồi trở về B ngay, 2 người gặp nhau lần hứ 2 tại điểm G cách B 3km vào lúc 5 giờ 45 phút a, Tính độ dài quãng đường AB b, Tính vận tốc của Minh HD: lần thứ 1 ở C . Minh đi dc 5km lần thứ 2 gặp ở G . Minh đi dc 5.3=15km quãng đường AB: (15+3):2=9km vận tốc của Minh 15:3/4=20km/giờ MIK giải ra roii các bạn chỉ việc làm lời giải chi tiết là dc

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