ECZ 2023 · O-Level Paper 1 — Variation

If a varies jointly as b and the square root of c and a = 21 when b = 5 and c = 36, find the value of (c) c when a = 70 and b = 25.

Verified working — step 1

a = kb√c

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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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