Xiaohong left the house at about 11 o'clock in the morning, when the hour and minute hands of the wall clock coincided, and when she came home at about 5 o'clock in the afternoon, the hour and minute hands of the wall clock were in the opposite direction (in a straight line). So how many hours did Xiaohong go out?
小红在上午将近11点时出家门，这时挂钟的时针和分针重合，当天下午将近5点时，她回到家，这时挂钟的时针与分针方向相反(在一条直线上)．则小红共出去了多少小时．
<result>6</result>