ECZ 2023 · O-Level Paper 1 — Variation
a varies jointly as b and the square root of c, and a = 21 when b = 5 and c = 36. Find the value of k, the constant of variation.
- A. 107
- B. 7
- C. 110
- D. 710
Verified working — step 1
Translate the words first: "jointly as b and the square root of c" multiplies both onto k - and it is √c, not c.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.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question