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Mathematics, 25.07.2021 19:30 aprilkenedy12

Một người đi ô tô từ A với vận tốc 50km/h Đến B người đó liên hệ công tác trong 1 giờ 30 phút rồi quay về A với vận tốc 40km/h Tính quãng đường AB biết tổng thời gian cả đi , về và thòi thời gian làm việc ở B là 8 giờ 15

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