the surface area of a sphere is same as the curved surface area of a right circular cylinder whose height and diameter are 8 cm each . the radius of the sphere is
solution 4 î r 2 = 2 î 4 x 8 â ‡ ’ r 2 = ( 4 x 8 / 2 ) â ‡ ’ 16 â ‡ ’ r = 4 cm . answer b
sqrt(divide(multiply(multiply(const_pi, multiply(8, divide(8, const_2))), const_2), multiply(const_pi, const_4)))