Geometry and TrigonometryVery hardVolume factor when a sphere's radius doubles
Geometry and Trigonometry practice question
The radius of a sphere is doubled. The volume of the larger sphere is how many times the volume of the original sphere?
Answer: 8
Volume scales with r³, and 2³ = 8.
Common wrong answers
- If you answered 2
- 2 is the scale factor for lengths, not volumes.
- If you answered 4
- 4 is the scale factor for surface area.
- If you answered 6
- 6 comes from 2 × 3.
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