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Dungthuy296
2 năm trước
mik đang cần gấp ai làm giùm hứa vote 5 sao ạ, xin cảm ơn hai đội xe cùng làm một công việc trong 80 giờ. nếu đội xe thứ nhất làm trong 10 giờ và đội xe thứ hai làm trong 12 giờ thì hoàn thành 2/15 công việc. hỏi nếu làm riêng thì mỗi đội làm xong công việc trong bao lâu ?
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