A man drives from his home at 30 miles per hour to the shopping center which is 30 miles from his home.On the return tri
A man drives from his home at 30 miles per hour to the shopping center which is 30 miles from his home.On the return trip he encounters heavy traffic and averages 12 miles per hour.How much time does the man take in driving to and from the shopping center?(翻译,顺便帮我计埋拉!thanks咯!）
A man drives from his home at 30 miles per hour to the shopping center which is 30 miles from his home.
某（男）人以30英里/小时的速度从家里开往距离他家30英里的购物中心.
On the return trip he encounters heavy traffic and averages 12 miles per hour.
在回程的路上,他遇到了严重的交通阻塞,所以平均速度是12英里/小时
How much time does the man take in driving to and from the shopping center?
这个（男）人花了多少时间在去购物中心和从那返回家的路上?
计算：
去购物中心--- 30 miles ÷ 30 miles / hour = 1 hour
返程 --- 30 miles ÷ 12 miles / hour = 2.5 hours
(这一步题目没要求需要) 共计 --- 1 hour + 2.5 hours = 3.5 hours