Question

father is now three times as old as his son. four years ago he was four times as old as his son... what is the present age of the son?​

Answer 1

Step-by-step explanation:

father is now three times as old as his means

: 3:1

four years ago he was four times as old as his son therefore = 4:1

so there is difference in ratio

3:1 * 3 = 9:3

4:1 * 2 = 8:2 so difference between two ratio is 1.

1a = 4 so a = 4

age of son = 4*3 12 +4 ( ago age) = 16