Mathematics for IGCSE & O level - Similarity (Section 1 - No. 28)
The volumes of two similar solids are in the ratio 1:8. What is the ratio of their surface areas?
1:2
1:4
1:8
1:64
คำอธิบาย
If the volumes are 1:8 the length ratio is 1:2. Surface area = (length)^2, thus 1:4