Q176
The ratio of the volumes of a right circular cylinder and a sphere is 3 : 2. If the radius of the sphere is double the radius of the base of the cylinder, find the ratio of the total surface areas of the cylinder and the sphere :
A.
9 : 8
B.
13 : 8
C.
15 : 8
D.
17 : 8
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Let the radius of the cylinder be rThen, radius of the sphere = 2r
∴ Required ratio :