Find the ratio between whole surfaces of a sphere and a hemisphere?	Choices:	A) 4 : 3	B) 3 : 4	C) 3 : 2	D) 5 : 2	E) 4 : 6

Rationale: 4 ï € r 2 : 3 ï € r 2 = > 4 : 3 answer a
Answer: A