When Mr Fabian is 41 years old, his cousin is 9 years old. In how many years will he be 3 times as old as his cousin?
|
Mr Fabian |
His cousin |
Difference |
Before |
41 |
9 |
32 |
Change |
+ ? |
+ ? |
|
After |
3 u |
1 u |
2 u |
The difference in the age between Mr Fabian and his cousin at first and in the end remains the same.
Difference in the age between Mr Fabian and his cousin
= 3 u - 1 u
= 2 u
2 u = 41 - 9
2 u = 32
1 u = 32 ÷ 2 = 16
Number of years' time so Mr Fabian will be 3 times as old as his cousin
= 16 - 9
= 7
Answer(s): 7