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What is meant by IDL? State its importance.
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What are the Great Circle Routes?
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Give a reason for the lines of longitude are also called Meridians of longitude.
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Give a reason for the diametrically opposite lines of longitude and the Equator are called Great Circles.
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Give a reason the greenwich time is called Greenwich Mean Time.
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Give a reason the international date line deviates and goes zig-zag near some Islands in the Pacific ocean.
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With reference to the International Date Line, state the following:
It is meaning and application.
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With reference to the International Date Line, state the following:
The important deviations it makes and reasons for the same.
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State with an example how time lost or gained is computed with reference to the International Date Line.
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State the use of the lines of longitude in relation to distance and time.
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Make a detailed study of finding time with the help of longitudes. Give one practical example.
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A cricket match was to be held at Birmingham at 9 a.m. local time. The position of Birmingham is 5° W. Calculate the time the viewers have to tune their television in Sydney 151°E.
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An important programme was to be broadcast from Mumbai at 7.30 p.m. This was heard by some Indian sailors near Ivory Coast in West Africa at 20°W longitude. What was the local time there?
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What is the longitude of a place where the local time 1:15 p.m. when it is 4 a.m. at Chicago (88°W)?
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Calculate the time at Durban (longitude 30°E) when the time is 7.00 a.m. at New York (75°W).
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Calculate the longitude of a place where the local time is 6.00 a.m. when the time is 9.00 p.m. at New Delhi on longitude 77° E.
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Calculate the local time in Singapore (104°E) when it is 6.00 p.m. at Greenwich.
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Calculate the location of a place where the local time is noon when it is 7.30 p.m. at Greenwich.
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What is the time and day at Mumbai (73°E) when it is Sunday at 10.30 p.m. at Shillong (92°E)? Give a reason to support your answer.
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