ECZ 2024 · GCE Paper 1 — Similarity and Congruency
The ratio of the areas of two similar solids is 9:25. If the volume of the bigger solid is 375 cm3, what is the volume of the smaller solid?
- A. 225 cm3
- B. 81 cm3
- C. 135 cm3
- D. 15 cm3
Verified working — step 1
Similar solids link three ratios: lengths in ratio k, areas in k2, volumes in k3. Given an area ratio, step DOWN to lengths first, then UP to volumes.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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