ECZ 2014 · O-Level Paper 1 — Earth Geometry
Two places A and B lie on the equator and are 2 820 nautical miles apart. A is on longitude 17°W and B is east of A. Find the longitude of B.
- A. 30°E
- B. 64°E
- C. 30°W
- D. 47°E
Verified working — step 1
Along the equator 1 nautical mile is 1 minute of arc, so the difference in longitude is 2 820 ÷ 60 = 47°. Starting at 17°W and moving 47° east: −17° + 47° = …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.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question