ECZ 2010 · O-Level Paper 1 — Variation
It is given that x varies inversely as the square of y and directly as z, and x = 2 when y = 3 and z = 4. Find k, the constant of variation.
- A. 9
- B. 4.5
- C. 2
- D. 18
Verified working — step 1
x = kzy2, so 2 = 4k9, giving 4k = 18 and 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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