two - third of a positive number and 16 / 216 of its reciprocal are equal . the number is :
let the number be x . then , 2 / 3 x = 16 / 216 * 1 / x x 2 = 16 / 216 * 3 / 2 = 16 / 144 = 1 / 9 x = 1 / 3 answer : c
sqrt(divide(multiply(16, const_3), multiply(216, const_2)))