A train travels from New York to Chicago, a distance of approximately 480 miles, at an average rate of 40 miles per hour and arrives in Chicago at 6:00 in evening, Chicago time. At what hour in the morning, New York time, did the train depart for Chicago? (Note : Chicago time is one hour earlier than New York time)
Answers: A) 3:00 B) 4:00 C) 5:00 D) 6:00 E) 7:00
6:00 in evening in Chicago = 7:00 in evening in New York. So, the train was in Chicago 7:00 in the evening, New York time.   The trip took T=D/R=480/40= 
<gadget id="calculator">480/40</gadget>
<output>12</output>
12 hours. Therefore, the train depart from New York at 7:00 - 12 hours= 7:00 in the morning, New York time.   Answer: 7:00.
<result>E</result>
A train travels from New York to Chicago, a distance of approximately 480 miles, at an average rate of 40 miles per hour and arrives in Chicago at 6:00 in evening, Chicago time. At what hour in the morning, New York time, did the train depart for Chicago? (Note : Chicago time is one hour earlier than New York time)