ECZ 2010 · O-Level Paper 1 — Variation
x varies directly as z and inversely as the square of y, with constant k = 4.5 (so x = 4.5zy2). Find y when x = 3 and z = 24.
- A. 36
- B. 12
- C. 4
- D. 6
Verified working — step 1
y sits squared in the denominator - clear the fraction first, then undo the square.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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