ECZ 2020 · O-Level Paper 1 — Earth Geometry
A plane flies from A (35°W) to B (40°E) along the equator in 5 hours. Find its speed in knots. [1° = 60 nautical miles.]
- A. 750 knots
- B. 4500 knots
- C. 900 knots
- D. 180 knots
Verified working — step 1
Distance A → B along the equator = 75° × 60 = 4500 nautical miles. Speed = distance ÷ time = 4500 ÷ 5 = …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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