ECZ 2016 · GCE Paper 1 — Social and Commercial Arithmetic
Bronze is made up of zinc, tin and copper in the ratio 1 : 4 : 25 respectively. A bronze statue contains 120 g of tin. Find the required quantities of the other metals.
- A. zinc 30 g, copper 750 g
- B. zinc 24 g, copper 600 g
- C. zinc 120 g, copper 750 g
- D. zinc 30 g, copper 600 g
Verified working — step 1
Tin's 4 parts equal 120 g, so 1 part = 30 g. Zinc (1 part) = 30 g and copper (25 parts) = 25 × 30 = …The full step-by-step working and final answer 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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