If 6 ( A's Capital ) = 8 ( B's Capital ) = 10 ( C's Capital ) , then what is the ratio of their capitals ?

Question

The age of a father 10 years ago was thrice the age of his son . Ten years hence, the father's age will be twice that of his son. What is the ratio of their present ages?

Answer 1

From the question
6A = 8B = 10C = k

So A = k/6, B = k/8, and C = k/10

Therefore
A : B : C = k/6 : k/8 : k/10

or ratio is 20:15:12

Answer 2

let x = k/6 = k/8/ = k/10

so its 20:15:12

ex: 6*20 = 8*15 = 10*12 = 120