ECZ 2015 · O-Level Paper 1 — Variation
y is proportional to x³ with constant of variation k = 14. Find x when y = 54.
- A. x = 6
- B. x = 216
- C. x = 13.5
- D. x = 3
Verified working — step 1
54 = (14)x³ ⇒ x³ = 216 ⇒ x = ∛216 = …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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