ECZ 2012 · O-Level Paper 1 — Variation
y varies directly as x and as z, with constant k = 3 (so y = 3xz). Find the value of x when y = 4 12 and z = 5.
- A. 30
- B. 0.3
- C. 3
- D. 1.5
Verified working — step 1
Collect the constant and the known z into one coefficient of x, then divide.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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