ECZ 2020 · O-Level Paper 1 — Earth Geometry
The diagram below shows two towns A and B on the equator. A is on longitude 35°W and B is on longitude 40°E. Find the time at A when it is 18 00 hours at B.
- A. 23 00 hours
- B. 13 00 hours
- C. 11 00 hours
- D. 13 20 hours
Verified working — step 1
A and B sit on OPPOSITE sides of the Greenwich meridian, so their longitudes add - then 15° of longitude is 1 hour, and WEST means an EARLIER clock.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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