Mensurationmedium · Past Paper
If the height of a cone is tripled and its radius is doubled, the volume becomes how many times the original?
A12 times
B6 times
C9 times
D18 times
✓ Correct Answer: A — 12 times
V' = 1/3 π (2r)² (3h) = 1/3 π (4r²) (3h) = 12 (1/3 π r² h) = 12V.
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