4MA1/1FR Jan 2022, Question 24: Surface Area of a Cuboid and Cylinder
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1FR (Foundation) · Calculator · 6 marks
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The question, in short
Find the total area of the four sides and top of a 12 m by 2.5 m by 3 m cuboid, then use paint coverage of 15 m² per tin and a £26.95 price after a 10% rise to show the pre-increase cost was under £200.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 6 marks
- 1Area: two ends 2 × 3 × 2.5 = 15, two sides 2 × 12 × 3 = 72, top 12 × 2.5 = 30
- 2Total = 117 m², and 117 ÷ 15 = 7.8, so he needs 8 tins
- 3Price before the 10% increase = 26.95 ÷ 1.1 = £24.50
- 48 × 24.50 = £196, less than £200, so Jonty is correct
AnswerJonty is correct
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