4MA1/2H Jan 2023, Question 21: Volume and Surface Area of a Sphere
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2H (Higher) · Calculator · 3 marks
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The question, in short
A sphere has surface area 49π cm²; find its volume, rounded to the nearest integer.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 149π = 4πr²
- 2r² = 49 / 4
- 3r = 3.5
- 4volume = (4/3)π × (3.5)³
- 5volume = (4/3)π × 42.875
- 6volume ≈ 179.59
- 7180
Answer180
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