The ratio of two spheres is 1 : 2, then the ratio of their surface areas is
A. 4 : 1
B. 1 : 8
C. 1 : 4
D. 8 : 1
Answer:C
The ratio of two spheres is 1 : 2, then the ratio of their surface areas is
A. 4 : 1 B. 1 : 8 C. 1 : 4 D. 8 : 1