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 y when x = 4 and z = 3.
- A. 36
- B. 12
- C. 6
- D. 108
Verified working — step 1
Direct in BOTH x and z means the two multiply, and the constant multiplies with them.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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