4MA1/2F Jun 2020, Question 13: Earnings and Deductions
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 5 marks
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The question, in short
Work out the least cost to paint a trapezium-shaped gym floor, given paint coverage of 20 m² per tin and a special offer on tins.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 5 marks
- 1Area = ½ × (20 + 26) × 12 = 276 m²
- 2Tins: 276 ÷ 20 = 13.8, so 14 tins
- 3Cheapest: 3 offers of 4 tins + 2 single tins
- 4Cost = 3 × 40 + 2 × 13 = 120 + 26 = 146
Answer146
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