ECZ 2012 · O-Level Paper 1 — Earth Geometry
A plane flew north from town A (28 S, 20 E) to town B (32 N, 20 E) in 9 hours. Find the speed of the plane in knots.
- A. 3600 knots
- B. 40 knots
- C. 400 knots
- D. 240 knots
Verified working — step 1
A and B share the longitude 20 E, so the difference in latitude is 28 + 32 = 60 degrees. Along a meridian that is 60 x 60 = 3 600 nautical miles. Speed = 3 6009= …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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