ECZ 2019 · O-Level Paper 1 — Earth Geometry
The diagram below shows the positions of towns A, B and C on the earth’s surface. (a) If it is 08 20 at A, what time is it at C?
- A. 13 20 hours
- B. 08 20 hours
- C. 12 20 hours
- D. 03 20 hours
Verified working — step 1
Read the meridians off the diagram carefully. A lies on the inner meridian, and that same curve runs down through B, so A and B share longitude 20°E. C lies on the outer meridian, 95°E. The longitude difference between A and C is therefore 95° − 20° = 75°. Since 15° of longitude is 1 hour, 75 ÷ 15 = 5 hours. C is east of A, so C is ahead: 08 20 + 5 hours = …The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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