alleryThe radii of two spheres are in the ratio 2 : 3. The ratio of their volumes is
A8 : 27
B4 : 9
C2 : 3
D16 : 81
Answer & Solution
Correct answer: A. 8 : 27
1. Volume scales as radius cubed.
2. (2/3) cubed = 8/27.
3. Hence 8 : 27.
_Source: syllabus Mathematics, Ch 12 "Surface Areas and Volumes", §12.2_
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