Find the ratio between whole surfaces of a sphere and a hemisphere?
A. 3:4
B. 4:3
C. 3:1
D. 1:3
4 πr2 : 3 πr2 => 4:3
A. 3:4
B. 4:3
C. 3:1
D. 1:3
4 πr2 : 3 πr2 => 4:3