When Mr Jenson is 35 years old, his cousin is 9 years old. In how many years will he be 3 times as old as his cousin?
|
Mr Jenson |
His cousin |
Difference |
Before |
35 |
9 |
26 |
Change |
+ ? |
+ ? |
|
After |
3 u |
1 u |
2 u |
The difference in the age between Mr Jenson and his cousin at first and in the end remains the same.
Difference in the age between Mr Jenson and his cousin
= 3 u - 1 u
= 2 u
2 u = 35 - 9
2 u = 26
1 u = 26 ÷ 2 = 13
Number of years' time so Mr Jenson will be 3 times as old as his cousin
= 13 - 9
= 4
Answer(s): 4