ECZ 2020 · O-Level Paper 1 — Variation
It is given that y varies directly as the cube root of x and inversely as the square of z, and y = 2 when x = 8 and z = 4. Find (a) k, the constant of variation.
- A. 2
- B. 16
- C. 8
- D. 116
Verified working — step 1
y = k·∛xz². Substituting: 2 = k·∛84² = k·216= k8, so k = …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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