4MA1/1HR Jun 2023, Question 11: Compound Measures
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1HR (Higher) · Calculator · 3 marks
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The question, in short
A cuboid of iron measures w cm by 5 cm by 4 cm, with density 7.8 g/cm³ and mass 1950 g. Work out the value of w.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1Volume = mass ÷ density
- 2Volume = 1950 ÷ 7.8 = 250 cm³
- 3Volume of the cuboid = w × 5 × 4 = 20w
- 420w = 250
- 5w = 250 ÷ 20
- 6w = 12.5
Answer12.5
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