two - third of a positive number and 49 / 216 of its reciprocal are equal . the number is :
"let the number be x . then , 2 / 3 x = 49 / 216 * 1 / x x 2 = 49 / 216 * 3 / 2 = 49 / 144 x = 7 / 12 answer : b"
sqrt(divide(multiply(49, const_3), multiply(216, const_2)))