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 :
"explanation : curved surface area of sphere = 4 / π r 2 surface area of cylinder = 2 π rh = > 4 / π r 2 = 2 π rh = > r 2 = 6 ∗ 12 / 2 = > r 2 = 36 = > r = 6 note : diameter of cylinder is 12 so radius is taken as 6 . option b"
sqrt(divide(multiply(multiply(const_pi, multiply(12, divide(12, const_2))), const_2), multiply(const_pi, const_4)))