ECZ 2016 · O-Level Paper 1 — Earth Geometry
What is the shortest distance over the Earth’s surface between A(32°N, 8°W) and B(40°N, 172°E)? [R = 6370 km, π = 22⁄7]
- A. 6 006 km
- B. 16 016 km
- C. 12 012 km
- D. 5 720 km
Verified working — step 1
Spot the special configuration: 8°W and 172°E differ by exactly 180°, so A and B share one great circle through the POLES - and the shortest route goes over the top.The full step-by-step working and final answer, plus the video lesson for this topic, 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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