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 (b) value of a when b = 2 and c = 3,

Verified working — step 1

a = 3bc²

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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