ECZ 2011 · O-Level Paper 1 — Similarity and Congruency
The ratio of the surface areas of two similar bottles is 4 : 9. What is the ratio of their volumes?
- A. 2 : 3
- B. 4 : 9
- C. 16 : 81
- D. 8 : 27
Verified working — step 1
Area ratio 4 : 9 gives length ratio 2 : 3. Volumes scale by the cube of the length ratio, so 23 : 33 = …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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