ECZ 2019 · GCE Paper 1 — Approximations

The length of a piece of wire is 15.2 cm, correct to 1 decimal place. What is the relative error of the length of the piece of wire?

Verified working — step 1

Two steps: the absolute error is half the smallest unit, and the relative error compares it with the measurement itself.

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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