A train travels from New York to Chicago, a distance of approximately 840 miles, at an average rate of 60 miles per hour and arrives in Chicago at 6:00 in the evening , Chicago time . At what hour in the morning, New York City time, did the train depart for Chicago time . At what hour in the morning , New York City time, did the train depart for Chicago ? ( Chicago time is one hour earlier than New York City time.)

Question

A train travels from New York to Chicago, a distance of approximately 840 miles, at an average rate of 60 miles per hour and arrives in Chicago at 6:00 in the evening , Chicago time . At what hour in the morning, New York City time, did the train depart  for Chicago time . At what  hour in the morning , New York City time, did the train depart for Chicago ? ( Chicago time is one hour earlier than New York City time.)

Satt Academy · Accepted Answer

5 : 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 = 840/60 = 14 hours. Therefore, the train...

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