A train travels from New York to Chicago, a distance of approximately 540 miles, at an average rate of 60 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) Choose one
A) 3:00  B) 4:00  C) 5:00  D) 6:00  E) 10:00
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=540/60= 
<gadget id="calculator">540/60</gadget>
<output>9</output>
9 hours. Therefore, the train depart from New York at 7:00 - 9 hours= 10:00 in the morning, New York time.   Answer: 10:00.
<result>E</result>
A train travels from New York to Chicago, a distance of approximately 540 miles, at an average rate of 60 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)