ECZ 2021 · GCE Paper 1 — Earth Geometry
The diagram shows towns A, B and C on the earth's surface, where NACS is the prime meridian, A is on longitude 0° and B is on longitude 30°W. If the local time at A is 10 30 hours, find the local time at B.
- A. 12 30 hours
- B. 06 30 hours
- C. 08 30 hours
- D. 10 30 hours
Verified working — step 1
The difference in longitude is 30°. Each degree is 4 minutes, so 30 × 4 = 120 minutes = 2 hours. B is west of A, so B is behind: 10 30 − 2 00 = …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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