Find the ratio between whole surfaces of a sphere and a hemisphere? Answers:  A) 4:9  B) 4:3  C) 4:5  D) 4:0  E) 4:1
Explanation:   4 πr2 : 3 πr2 =&gt; 4:3   Answer: Option 4:3
<result>B</result>
Find the ratio between whole surfaces of a sphere and a hemisphere?