Question

Calculate the Present Age of the Father
A father is six times older than his son. However, 20 years later he will be only twice as old as the sun. What is the present age of the father?

Answer 1

Let us assume, the present age of father is x years and present age of son is y years.
Given:
x = 6y -------------1
x + 20 = 2 (y + 20)
x + 20 = 2y + 40
x - 2y = 20 ------------2
Substitute the value of x from equation 1 in equation 2
6y - 2y = 20
4y = 20 
y = 5 years
Therefore, x = 6 * y = 6 * 5 = 30 years.
The present age of father is 30 years.