ECZ 2021 · O-Level Paper 1 — Variation

It is given that y varies directly as 2x and inversely as z² and y = 4 when x = 8 and z = 2. Find the (b) value of y when x = 27 and z = 3,

Verified working — step 1

y = 2xz²

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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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