ECZ 2019 · O-Level Paper 1 — Variation
a varies directly as b and as the square of c, and a = 30 when b = 2.5 and c = 2. Find the value of a when b = 2 and c = 3.
- A. 36
- B. 27
- C. 18
- D. 54
Verified working — step 1
Pin down k from the first set of values, then run the formula forwards on the new ones.The full step-by-step working and final answer, plus the video lesson for this topic, 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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