The surface area of a sphere is same as the curved surface area of a right circular cylinder whose height and diameter are 12 cm each. The radius of the sphere is	Choose the correct choice from the following
A) 3 cm  B) 4 cm  C) 6 cm  D) 8 cm  E) None
Solution   4ΠR2	= 2Π6x12   ⇒ R2 = (6x12/2)   ⇒ 36   ⇒ R = 6 cm.   Answer 6 cm
<result>C</result>
The surface area of a sphere is same as the curved surface area of a right circular cylinder whose height and diameter are 12 cm each. The radius of the sphere is