ECZ 2020 · O-Level Paper 1 — Approximations
Chiyalwa estimated the length of a string as 15 cm. If the true length of the string was 14.6 cm, find (b) the relative error.
- A. 275
- B. 0.4
- C. 173
- D. 273
Verified working — step 1
Relative error = absolute error ÷ true value = 0.4 ÷ 14.6 = 4146= …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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