Question

Describe the lines of longitude and state their use in relation to distance and time.​

Answer 1

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As the earth takes 24 hours to make a complete rotation along its axis crossing 360° lines of longitude, so earth takes nearly 4 minutes to move one degree (1 °) longitude or 111 km length or distance.

Answer 2

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᪥) Describe the lines of longitude and state their use in relation to distance and time.

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• A longitude is the angular distance of a place east or we§t of the Prime Meridian or 0° longitude.
• The lines of longitude are the great semi-circles joining North pole and South pole and are equal in length.
• These are 0° – 180°E and 0° – 180°W longitudes or total 360°.
• As the earth takes 24 hours to make a complete rotation along its axis crossing 360° lines of longitude, so earth takes nearly 4 minutes to move one degree (1 °) longitude or 111 km length or distance.
• There is difference of time of one hour between 15° interval of longitudes. According to the clock-time, EGA stands for East-Gain-Add and WLS means West Lose Subtract.
• In other words for each 10 longitude towards east 4 minutes are to be added and towards west for each 1° longitude 4 minutes are to be subtracted.

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