Geography
What is the longitude of a place where the local time is 1:15 p.m., when it is 4 a.m. at Chicago (88°W)?
Answer
The time difference between the two places is 9:15 hrs (540 + 15 = 555 min).
So the longitudinal difference will be 555/4 = 138.75° degrees.
The longitude of the required place will be 50° 45′ E i.e. it will cover 88° from west to 0° and 50° 45 east from 0° or Greenwich line.
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