the ratio of three numbers is 4 : 2 : 5 and their sum is 121 . the second number of the three numbers is ?
"4 : 2 : 5 total parts = 11 11 parts - - > 121 1 part - - - - > 11 the second number of the three numbers is = 2 * 11 = 22 answer : a"
sqrt(divide(121, add(power(5, 2), add(power(4, 2), power(2, 2)))))