ECZ 2017 · O-Level Paper 1 — Travel Graphs
The diagram below shows a speed-time graph of a car journey. If the total distance travelled was 825m, find the average speed for the whole journey.
- A. 30 m/s
- B. 15 m/s
- C. 20 m/s
- D. 18⅓ m/s (≈18.3)
Verified working — step 1
Average speed = total distance ÷ total time - and it lands BELOW the 30 m/s cruise because of the speeding-up and slowing-down stages.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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