determine the local time at 45 degree east and at 45 west longitude when the Greenwich mean time is 10 am Wednesday
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1. You decide on a latitude at the two longitudes. For the fun of it, we'll take 42° N, 45° E and 20° S, 45° W.
2. Locate the time zones. The first is in Tbilisi - Wikipedia, Georgia - Wikipedia, with an offset UTC+4. The second is in Brazil, with an offset of UTC-3.
3. Calculate the differences. At 45° E, the time will be 14:00. At 45° W, the time will be 7:00.
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