ECZ 2015 · O-Level Paper 1 — Earth Geometry
An aeroplane leaves a town P(33°N, 32°E) and flies due south to a town Q(12°S, 32°E). Given that it flew for 4 hours to cover the distance PQ, find the average speed of the aeroplane in km/h. (Take π to be 227and R = 6370 km)
- A. 1 251.25 km/h
- B. 5 005 km/h
- C. 583.58 km/h
- D. 2 502.50 km/h
Verified working — step 1
P and Q are on the same meridian and on opposite sides of the equator, so the angle between them is 33° + 12° = 45°. Distance = (45360) × 2 × (227) × 6370 = 5 005 km. Average speed = 5 005 ÷ 4 = …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