A father is now three times as old as his son. Twelve years ago he was six times as old as his son. How old are the son and the father?
- 20 and 45
- 100 and 150
- 45 and 65
- 35 and 75
-
20 and 60
The correct answer is: E
Explanation
Son = x, Father = 3x, 12 yrs agoson = x - 12, father = 3x - 12
3x - 12 = 6(x - 12)
3x - 12 = 6x - 72
3x = 60
x = 20