Arithmetichard · Past Paper
The ratio of the volumes of two spheres is 8:27. What is the ratio of their surface areas?
A2:3
B4:9
C16:81
D4:6
✓ Correct Answer: B — 4:9
Volume ratio (r1/r2)^3 = 8/27 => radius ratio r1/r2 = 2/3. Surface area ratio = (r1/r2)^2 = 4:9.
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