ECZ 2025 · GCE Paper 1 — Approximations

If 12.5 litres of water was poured out of a container containing 20 litres of water, find the relative error of the volume of water that remained in the container.

Verified working — step 1

Find what remained first, then compare its uncertainty with it.

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.

Have a different question?

Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.