Question

.the ages of two friends is in the ratio 6:5. the sum of their ages is 66.after how many years will the ages be in the ratio 8:7? 90

Answer 1

let common factor be x
6x + 5x = 66
11x = 66
x = 66/11
x = 6
ages= 6x = 6*6 = 36
5x=6*5=30