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4MA1/1FR Jan 2019, Question 15: Volume of a Prism

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1FR (Foundation) · Calculator · 4 marks

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The question, in short

Fish tank is a cuboid with base 45 cm by 80 cm. For 20 fish needing 9 litres each, find the minimum water depth required.

Summarised in our own words. Use the official paper for the exact wording and the diagram.

Solution · 4 marks

  1. 1Water needed = 20 × 9 = 180 litres
  2. 21 litre = 1000 cm³, so 180 litres = 180 000 cm³
  3. 3Base area = 45 × 80 = 3600 cm²
  4. 4Depth = 180 000 ÷ 3600 = 50

Answer50

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