When Mr Fred is 34 years old, his son is 6 years old. In how many years will he be 3 times as old as his son?
| |
Mr Fred |
His son |
Difference |
| Before |
34 |
6 |
28 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Mr Fred and his son at first and in the end remains the same.
Difference in the age between Mr Fred and his son
= 3 u - 1 u
= 2 u
2 u = 34 - 6
2 u = 28
1 u = 28 ÷ 2 = 14
Number of years' time so Mr Fred will be 3 times as old as his son
= 14 - 6
= 8
Answer(s): 8
