When Mr Seth is 44 years old, his son is 4 years old. In how many years will he be 3 times as old as his son?
| |
Mr Seth |
His son |
Difference |
| Before |
44 |
4 |
40 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the age between Mr Seth and his son at first and in the end remains the same.
Difference in the age between Mr Seth and his son
= 3 u - 1 u
= 2 u
2 u = 44 - 4
2 u = 40
1 u = 40 ÷ 2 = 20
Number of years' time so Mr Seth will be 3 times as old as his son
= 20 - 4
= 16
Answer(s): 16
