ECZ 2018 · GCE Paper 1 — Travel Graphs
The speed-time graph shows a particle which accelerated uniformly from rest to 20 m/s in 10 seconds, travelled at 20 m/s for 20 seconds, then decelerated to rest at time t. Given that the total distance covered was 750 m, find the value of t.
- A. 50
- B. 65
- C. 45
- D. 55
Verified working — step 1
Write the total 750 m as the areas of a triangle, a rectangle and a final triangle - the unknown t lives only in the last one.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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