ECZ 2021 · O-Level Paper 1 — Approximations
A learner measured the length of a line to be 2.2 cm. The actual length of the line is 2 cm. Find the percentage error in the learner's measurement.
- A. 110%
- B. 20%
- C. 10%
- D. 0.10%
Verified working — step 1
Percentage error compares the mistake with the ACTUAL length - how serious a 0.2 cm slip is on a 2 cm line.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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